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 0x7d25004aec98d9cb0c4c6837e088a5ac4c22cf25c6364566d598be8c8cbf0622. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07a440cb-ab01-449b-8f01-17fe664a580c.json and https://artists.proofprofile.net/proofs/artist/07a440cb-ab01-449b-8f01-17fe664a580c.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 0x6b7e0606f6b94d8ee368bdfeb06c43e1d186fa3ad0ac843aab67dac7a544ac39. 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/FR7JK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaca99d6a6e9150da37781feee561e0209665f38bd8d61101701e10faabc5af. 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/FR7JK2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba62773630dce61bc783ff686e58df1d024107d296dc36f8d0f46875ce828d0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR7JK2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c00b63324c590db605f71a02f4c78e7c3749f2dea02b800d6e5f45209a9a14f. 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/FR7JK2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899e4eddb494e83ffa90bdd4d76bf6e056c1fbb1a8a43e3226ce4e2b2516d0c1. 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/FR7JK2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceb48fd3f61569882006e52be371fb3aa6e14121e7bf7a9bcc9eab6a51213d3. 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/FR7JK2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddd66752fb0fd2d7618e9cab9cc74a91472fcedd664e9ac04a8a976b3118a33. 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/FR7JK2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3a2401b8059dcf7ae10b9bc7bb019d8b82659d53d6cbf65191c3f1e862cc8b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR7JK2300080.
Ça fait longtemps qu'j'ai pas vu la mer (acoustique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee261ae35d93291fe6e238cc224e624fc969b020714a726bbdffa33309241fa. 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/FR7JK2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c09645e100784e5b01a318caa6307fc9ccf18b38eb4ec55afa156371a70513. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPLR2215304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17287bba038e71c9ddd263e2fc2b55a7c0bb9d864405a8923547fedc2f8c38c1. 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/QZDA62122153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3029c462a37ecae1d2e963680090a3480beb62fba3add5f165e0bb93808fd1. 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/QZDA62122154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc8101845ab0ec94d77c93af97cdb2b16ab8325ea6070ed618a03fce33183d. 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/QZDA62122155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06473d3245928a90c44d18a9512e96c1df79a0393e00925fe02eccdd411c2f6. 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/QZDA62122156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500b0b81d3e83962ea072a76e1d6fd44fb3b808398bd381d79873b4c3e9c9320. 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/QZDA62122157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba400788c858e1819be7b3518270c0db85ec583c99d033d323c65a3f528947. 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/QZDA62122158.