1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f2b3bd825dde7f5edb7da89d32fe7246a8f65b964778cdbfd9b695aec1c0e3. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9db0706a-5769-4097-8695-5995f2c7b819.json and https://artists.proofprofile.net/proofs/artist/9db0706a-5769-4097-8695-5995f2c7b819.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38a21db07e6b00ee09068c4cd1ce06c913f01dd0721fc76d8f8b015a02bb804. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a5b7d453b704a65029f5ba8640ecda0aa3dae4b6fd5c3ffebdc7a4f17c4bf3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98adb605c20337a9e1fefe3fb13162cd23ac8a49183f41088a62858fbdd385e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07156d3201ff8411cd54302958ba0dc86b1455e3e8ebf42a6383928881713f63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a224c52ffbb64c62bcf04c1614be55b61da1d4252ce255ef43c9912da670e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3218ab55315060423f2303c219fd937299d9e1b336edf9f095bef9b881d66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc522f528fd1e2630cac1322dccd25823a0a66c5d9fbea0bc64d7a54a204aecd6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeba3e9e5221ef61874702d1199662e133e8eca3f89db3dfbfd38b733ce21bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a89477646894b9bc13806b8f532e3bd1006f20519e309c5bc982c260ef7de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cf8c7503dd991713ef0466588e1cf11fe9d6e65048244683eea7c8c93c17e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEPVA0100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334bbcb70a5fd7cf49f53d58a61a57f1061911a7ae8ab6c57cbf4b70db720d50. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b045eb709054c3825edbd7b5a4fa38a424bf242d96133640eb9334d72b25e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa654efc3cdd2aff2e94337cafad12cf3ec15489bfe328190de36159d97e1c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b495f32acdf930c4dac4420a2a1974e85814e6b83200e5aea94815327dbf502. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6057bb627688f5cabc5179f70864020219ec2b8b59cbf0beebd8575cd682b8d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd6e37ab1f8719463af4a648f90089412ad13c08dc35380263099a02b1e1d2b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726975c14fd6c73c9da91317283e46a1b63d5b4f090f1b7ce078195f23658764. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4c2eb52d7d41cf5b888673ace6b48729231c649718d405e04bf9a8039234e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97338e666f5b20932fc3020bea8826ab86da9fb312f83840c49144150f74140. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186f8e6241faeb51de442ecb993e24103369c9e4557e4fd92436b7f58d36af6a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d42f3e1733b01a819a28dd037ae711c9ba77178f7d07c2ec26b678f1029dee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313e8de20a1d9147b2e19567c6f8f931bd30af56234eb20eecd65f302843194. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4067b0b51df817437a492e449a597594c7ac69dde3d006b8e440e8da3748808. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f05cc38e9358654445a8bdafae12ac35ec252cb8b88bb708522184d46ef1cb1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e4910d69727a1f289d7d0c55a95c1df9ff869a8338efa35e51eaa6be74ee0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e1b380c5e1b9278e448f663c1b51ad837a65347f16e5651f486428055767e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82367b2e0e35a1169189e7af0e17388f620b583a45bf6e3408062c55a1a39c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc21c4bbc18c3dcf78de07627979e3d9a3b500acbb28e291f447988f78351b7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003707.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecacabaaa3a6abefd10032d1266fdf35200dd71a50d3a4c937c701336984751b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA5003712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1531607d17206de4b7ddfbd14d3061788138dc0ac38554b4edd804093ae1a8f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1105407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b959c09ba84bc255996e25e255412228671d881344a84e528ecc685f17100c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1305408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbf3946d16dbdf779eedfd1cac6de7878df6f60ec119e9fe1d150f67ea80667. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61533697d83d133d3598ae36e0ad85e4261bae47689158294fafe6a3a42412a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba86acc91250d2d06df1279d8252b9a64d17fe70e709b380e3db5903bf6d604d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79efe316fab04286274d413508d0e73717b63e906fa19a4e116db2fce5c554ee. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e8d5749ad4a8c5e1b295996320f3d2efdfe1f22b5fd506fe047589a753a120. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e34785be104042c5c45175bc69eb84fe6bc74f863b8df8c90601cd69d3a48. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e1f8b36d76128c18f0d97efd8a80c5f808fbbe300836affc74557f2754bfa. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f539a68689d5e6082c2658c42766f68e8d34ed31de12384107243d4e1d99b2f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69add112b7365c384a8157b8ed9cdd6660e8313645f5311b2e1063eb82ad64b1. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6277616819c57529053dd8e26ec132a0203fbf898ec7b0bf450761a38242227. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVFZ1203208.