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 0x2071c7039885ba7b03f4d2585d8a2c9724c820af61acaea62d7e0da9c2f278ef. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5da347dd-cc6b-47fa-951d-cfc523fff96f.json and https://artists.proofprofile.net/proofs/artist/5da347dd-cc6b-47fa-951d-cfc523fff96f.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 0x4837972300a0f7dbc2fc6fa8d2267b295d1ca74e07c77792d7c7e3ae762c4130. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ5AB1783184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdc7ec363478a0096fdef42d7447eba705edc0580d2ac779c11f8ce5dbe5a84. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:22Z), 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/QZ5AB1783207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ace2978c21f5179362190bffcd555828e0901632c6e1e1d6c6ae267ba2e60. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BRACP0900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cf3c84f75d700d4db645840fac5b90359d348c15ac4b42e87549c5b1a94794. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRACP0900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71f365058ff4f0dfdbc268bd7d7e0813d4eec3dc3ede63ee3c63a8238d803e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRACP0600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5cd113dc85e6240ceb95770847bd369108e268fa76cfbadc6181d7685d84e3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRACP0600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7206e7cf7d98eefb32a40e0524de2144ec40a7e05f6dfc54b0b9603188d545. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BR20F1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87595ffe500aab4605af39061c8aae7172a29f68a64171e414189e47a2859b08. 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/BR20F1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62524e39ea4fdd573ccafb26a5c1ad049cea8e780af6bde10a3ae84d853ecb7d. 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/BR20F1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e36625251d4e621ae8acf96067b7ea628fd3429d4269da40c656c865c44c34d. 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/BR20F1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3821985cbef8bebbf48abf5d27835fb8c73c75b9d20a3a22874aa3de6ec84eaf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNJX2047257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1423f30acdfd27c25617c71c01ca372c2788bb5a8384c1f850011ad9dcf72b. 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/BR20F1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b34694b9648947b739a3dace3766e6319d29590c7cb520484accdc29f62b2a. 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/BR20F1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed06e9b695c02f6da55f313a7dfc37be13f38d2859574d82a4842a7f973f822. 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/BR20F1600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f46279f0a16746a0659c4c007907303a4031d1870eb8cb528936c6ed0f42d1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BR20F1600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ecdc63ec35aa908477cca21a57bdda5904cc6ff279c6229b29cf4e6787e0c8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJX2047256.
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 0xec0270d8fbff32928d9cf10cd90e3b51ef97802f0e0f27296836527b53d6cfb5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BR20F1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6255a0076893ad2094aaeb953214071faf3e458e7fbe216fd9969dbdd8b263d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BR20F1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ffa291029e2b443c00ca8f59f4a253d5661d292cc5907bba0cc20a4e5ad0f1. 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/BR20F1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a07ece843794f8a94c670c4be3e74106b72000feba56ebf95e7dbf53c63698. 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/BR20F1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb178cea323ff8b657288751140a23c90333bbbe8bff0625fd2dbfa080bb2351d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BR6211700017.