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 0x80848a7dbdf255f076a76bfda462cddb771a7c832ff6ad491b1fd6c56f782f0c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/645cac01-212e-484c-88a7-85c46f96b4d7.json and https://artists.proofprofile.net/proofs/artist/645cac01-212e-484c-88a7-85c46f96b4d7.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 0x330e59a51fdceb0c173bfe42f5122331985a8b23802bc0da520e7f1d4459d534. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFN2123403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f8dd86f292070bbedf7e2adae7e9a46ed41e827851860278de789f865bfe4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:30:16Z), 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/TCAFF2041945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a38c036ae2ea3b7e81a68c59c31f57bccdf51d8c39c3e3b63366f9cd5083d3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:57:17Z), 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/TCAFI2012948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2e8c06f6c146f19759280fab22440caa45ba7c17ea2b28c1d2e71ef54aa3bc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAFF2042167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d230f02d79471657a79722b1369cc36b46f124c9eb7dd0546d7f77e55fa30. 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/TCAFP2176964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9d6dc2a1035e1d59c94cbea6e684fed92a2082c8485539c345701e5bf83e10. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAFR2106773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b1030c2b0e1c986eb72aedf77a53940bea7b188c9f965d9909b357f1e8e6ae. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAFZ2100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c9aafeb991b8239d975c221bae90c8fff941db19e035d0b974d0f03673699b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:22Z), 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/TCAFZ2107704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cda093a18ec24c74224aa09c47cbb5f1deab2cc15d4b0caa19f0d354356953. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGH2270616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0433991abe01f5ab514af67f75585ea1d2817526319ce52114c51f4cfdbbfc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:53Z), 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/TCAHF2348726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b225a3b972ed06fad908dfad52fd5668793a7093362fe9e28f0f2e18aa6c80. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAHT2304437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e9246897269754f6809e4903599277f6f505ffedc51d82e0e6700cb3d49b0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAHT2304785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93528ce10414b3d5a121e3d872aab574c6a83d4ff8ea8a8017898ee55f67cabf. 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/TCAIT2439747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72501905741913feab820aa3aa27c08a13365404838ddc2e7444e595747eee38. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:18Z), 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/TCAJB2455841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7cf5f4cf769564b707d6e18efa2479907412eabd7d09556bce799f5511d88. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT65X2514786.