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 0x0e209baa6487a6c2c8c3b7a7c2d1f3715bc05e59a54c36f1b47af1358e9e2bd8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c982b980-a928-4c0a-ad0c-377119235b81.json and https://artists.proofprofile.net/proofs/artist/c982b980-a928-4c0a-ad0c-377119235b81.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 0x8a7fc7ea28410a378f4533d57ff3a684cce01e648fc554d6ea54037889473dd3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:11Z), 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/NOX9X3714111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa453a7baffd0d1b371fb0ca3edf045b03aaaaf269633ccfb0ba6eafec06f0e67. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:59Z), 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/NOX9X3702801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b00e5c477143bce1651df239493ec5d24ba9992c2a1dae29e9e3a5cdc3b97. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:49Z), 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/NOX9X3702802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686094383589280af396914c7f7f8e0c290df1238fea888f456cb72402ad7c30. 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/NOX9X3652402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194664e563634e695a5ae9e3e28a324685218c4b330fe30413e25de9e5d73209. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NOX9X3652406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20268f0b0cfbbbd7b98f753b558baf5e41117ee3a56b9f34d8cac3a122c474d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEMDA0500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f7cd09c5ca056a28310b8761d8aeaad65f365d65f9b09a2f6b1095c071c4c6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SEMDA1000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c332774b6497187ab31b5a2bcca50fe1bd4e6c2842aa76720d40d144a9a47. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:43Z), 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/SEMDA1000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352a2ed96df37e445aab9525b6c73b065fff043b3a295e5c7a90ba04d0eeebe2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SEMDA1000710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7f3e1556b23980c70125ff488870423d3d1af3b2ba01b90075647f08699698. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEMDA2000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bd185d5e2d6cb1e11c85e38160b6c47ba9a92b47a0072226c5eecb6fc62550. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:47Z), 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/SEMDA2000707.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1195b3d28698ddf0cb7c982bf8f3d1aa743bec7ed0388ba7d3bbd90a6591b411. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMA9563130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e418c33d5723d224277be549296d660c9c996969108b9c46ebe2158a1205738. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMA9563250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c739c58f3620db2816d255586c4bab3258873d9478d8ebcad7de533d8632d48. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMA9563340.