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 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 0xe4c014e10972c8941cd93f23808b563750ea357d4ce17464a275e7a78adbc1b9. 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/b79983b6-fabc-4145-8a67-d777edff5941.json and https://artists.proofprofile.net/proofs/artist/b79983b6-fabc-4145-8a67-d777edff5941.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 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 0x7c6d9b023412c329b0ff74b9c6c820c9e5492e40da071814791271aed4e12785. 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/USA560505563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceb5cb2eb17009480c06a8849b01379c4007cf655996370822a6e0fc1e97c5b. 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/USA560505555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d8343eee82a2a49b2bf1aee9a5d5ee4f9b178fb409ce5bf43f0c9651923166. 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/USA560505556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760636bed7491d24a638acee1284d72c6d2229d3ba17dcc739b449d7f48b450c. 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/USA560505558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6777fbadb0bf8886a698e231ffe6b297ce61d9a5b02cd501c07b6fc28d05516d. 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/USA560505567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63076fe2e7e7b744d9d533b24952dd32dba2b1e7e43f5d7876aa2a64c0b5a9b4. 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/USA560505559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f77319cc9f67f25211da5c6d87aa8209e8e497f31d87eada5603d030d2edfc. 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/USA560505560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296b1fce0bc9139c3820b505a0d917b8c05faf112d3f98c4bb1bad8457774b33. 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/USA560505569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4e1cf4db0f01f22a9d51ebfa658b99ba7cf1c61f63b79592b400d46b16dbd3. 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/USA560505561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8ba50b33c48e23cb59f01d33bf717be7ef85292707fb66fd77f88bf9c338b4. 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/USA560505570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5033bf16eca32dfd4f96d14ecc9e53a06f506a5e627f3a4c091646b1c5559322. 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/USA560505562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2d05d662db4c011db9ade7b0d9590b7113792ad0363c8825c4333d4006ef65. 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/GBBCV0462008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152f66508d00472f4167e5b7d2c39182be661d0406679668090f69ee3436e8cf. 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/USA560508439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22872a881bc49c93ec3d438ac613d490b137ef51b6e8f11107f6015932fd525. 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/USA560508448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee18ccad1828ffdd8268e0a551efc830b14eb314028f910925db8878e20a26c. 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/USA560508443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14f5b7cce30fcf7f7e96ca0ff484c234d9cd2288ab9f01b31e46803b0a5bbc4. 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/INS369400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1d343447c590aff35f726890b6e562230fac0580b1a06124df23a96c37a40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS369400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe021a4d3466758a7d8556753b30c73fa49ef05fe35da38431501b7ffc8d57. 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/INS369400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544477b100fcf6e7ac15a30c295b4970b676cfe812bd539ac693d9249a6b9dd4. 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/INS369400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5d59e415f92da6afdf896c6d5447442fbb3497c0d3518dd940131c18ca679. 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/INS369400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb0be2b233819b60e7bb534fd4903c9445d5f40c1214e84b6b00c4012f5ff2. 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/INS369400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b02802384eca3eafc3b8fec108d595ddeb3c8b6ce9d40431aaf6d0f0515b0f. 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/INS369400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119dbe26478d8d6ef6704c337655dacd06024a00e2cee9ebc9afae5c933c0cb8. 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/INS369400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd089e17cef9ba313980b262eb6f0b4e25a602cbfac41b1a0e12ff527946facc. 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/INS369400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6dac34e0db7976cca6032a2cd7e190e560a41e2042b8778cb160193b784ef. 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/INS369400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95838f7f95ba4d57eb60d3055653de4c9e511d64a5d11b839e66bb03f1ce6280. 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/INS369400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa928b6b31f3370944c06ccce3a35e05e906fb702405f0f791ad73631068fe738. 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/INS369400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6efb57234a90818f2e898675307c50b9c8914244d8d76dfc1b8cf70a5bf40. 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/INS369400066.