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 0x76cb238e4b4ad6c153c995023713474c0dd6081b95cbefc3747743f53f010a0c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7964bcf-916b-4f20-913b-eba79697802a.json and https://artists.proofprofile.net/proofs/artist/f7964bcf-916b-4f20-913b-eba79697802a.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 0x3a8dbbcdd8594d80c2f7c9489be4d1b996dd805e3b0de720b418d553f94a1a56. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWKY12300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59bdceabb7fd107e47cb53287fc1035f4df6405d7d93cac38b72d8f82591eb9. 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/TWKY12300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b86030b364a283d2f824438534b608daeb457fde7d56bf3b693cc27069e89. 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/TWKY12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dfd0cd30ff57a7c94669fef7250d3344c06e3bdcdba8825b38abc839c46e2f. 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/TWKY12300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89817e7f3ee4b30e57d34b7d4a8e90398c56271c4eab09a0b3cdd8d488479f88. 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/TWKY12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471d041c2ae5f41309424491dd22cf3369d25f40a31e5d057479d869761d810. 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/TWKY12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0851015db81b8d593cfbc8a4bf0bfb604dbab8f7cd22ebd30c8d74ddd44576. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TWKY12300001.
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 0x520e04cbbaf7c40d578f715c8ef61ea1207ff4912bbe8641601bd66fca173520. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TWKY12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79daef05636fb92f7fe3ebbd76520130858de0b890c705aa3e191105e6c13618. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/TWKY12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebfa927ec810d7a5db922b9cd317c3f22b23208d40c499c3ed11ad6abf43c40. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWKY12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3d5e90047df9aa0aad75e2c84524d74f7e2f80c05081aa6540d5d4fae59c10. 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/TWP011737001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62e1dab5d72550bc60d736b834134b385a86080ca863247cf676829dfd1c1fc. 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/TWP011737002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f21898e61a2331abdf9b3c7938c140e05e7644bfb8f0deb0be14ad9c86337. 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/TWP011737003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ce49084a549b0ecec848ef7816ee66c2bdc56c4ded5e17757bf0c27db9beb3. 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/TWP011737005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f97c63f8c52c3b51d59b04c40d7c7642adcd6018f93d82c20372163022be561. 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/TWP011737006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20531ccf86707129f9e8fc57bf96816b36c21c8e368cbd4e6b5b118ed5aaccbc. 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/TWP011737007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4fcdcc1db9e51f7847371b406d8f99b637f77d2a849a79e786fe14bd818851. 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/TWP011737010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce06d99e8d98d591280abf6cf59a96429c90dd07f145e041613b91c0e5965f10. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWP011737004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda86c86704800aa0a1d76fe81d1a4611623e7f3eb30b10f15197ffdfbc400cf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TWP011737008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f09e4dd1dcac082a9861516215e0a17e8e3a9a5f9672114dc8060026d570c6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TWP011737009.