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 0x5e46eba8742c20edd22d20f71d4a3b2b16924cf35da9cce6e1a917101aadc833. 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/be49fa19-8520-4ef4-b179-e2b830c081ed.json and https://artists.proofprofile.net/proofs/artist/be49fa19-8520-4ef4-b179-e2b830c081ed.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 0x220336934e5143520f38b7e49a008edad73c05f9b872dcb4310c390dada294a1. 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/NLG662100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfdf51f43a013c3d82e333c2ad0dedbb564fa9d81a7714f7f9d27911baae186. 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/TCAFU2123372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99b330629f06effe48ca106d96d1d36a8cce0339a91833c2d7026aaf3871a7. 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/TCAEF1998317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37471b36ba847933fae9c684c8cc34253078231a61b57361adc0d51cb71a7e9. 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/NLG662000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b96e0c97fb87c91784725ad1950c71d484ec9d71755aaf94c1042e000057f2d. 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/TCAFK2162508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf58a59f31452af38071ae41dbff3f6fd339aed3acdb44bbcd34780f21d9a52. 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/NLG661800435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4543199fb6801e54219495adee50fbeb1f8c501cc7d1ea9f1d64d2e826f6b4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFR2179714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba229e94b149c920acbecea345724445b7a243bf6192f2110ffbe84d77a569d6. 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/TCAFK2162417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca0fd78b7d6b794dbd2e4fb6d9e6307f2bedfe96f8ab90a1414f278adb4b19. 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/TCAFJ2142427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23868b6e7247602e716f85a0913fa5152b130e81f3f1b731b0a7859c3d6557dc. 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/QMFME2336425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c9c502da0b657fa7e04179c5784800c5e4c2ab1c0b7892ddcc7c0429d400c8. 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/TCAFT2125639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fdc74d05456fecb37d510f39c0aa477fd92e968a4030ec242959feae48c8aa. 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/TCAFT2124126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220336934e5143520f38b7e49a008edad73c05f9b872dcb4310c390dada294a1. 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/NLG662100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e63a83cb47ce01499556287eb1a1e6288f9670ea1a2f64e6bb6b0213dee62. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLAM41900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89a0ef32a74fcda609740fae02b151b2292b6bcdfbba4c9b3de86110e62e314. 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/TCAEL1966462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d6db4d256cc81f1fe66718082518f9a6d5ff121323749259f75d3b754cdda5. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:19:53Z), 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/NLG662300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fce7f09e6000201bfe23a4aa24693715cac976f8af324a51c54ed53341a560. 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/NLB8R2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f9d9351973e3d7f7f64387d0737fdba98f79fbdb2d03f6f1e22085c88fdaf. 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/NLB8R1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f9d9351973e3d7f7f64387d0737fdba98f79fbdb2d03f6f1e22085c88fdaf. 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/NLB8R1900027.