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 0xc2e5eaa42d87cdfb1c1ef0ae0e04d0550d29ebed31ee1953e7dfb2050b4fad7f. 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/b77bda8d-021b-4184-a96a-1faa1eb83c4e.json and https://artists.proofprofile.net/proofs/artist/b77bda8d-021b-4184-a96a-1faa1eb83c4e.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 0x6ca478318929acfd57dcdbfe2f67d3db90618c3b0188633068bd85f47444eea7. 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/TCAFK2150232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbc40ee2123f01ffa399266baa81951ea9b71d1932b75090f58d0be28b9cafa. 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/TCAFJ2102194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d9a58145b065319a6d3f9520eb257f7528d78e49c16e4eb24c0fdbecc98df6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAFK2150237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1490bb6a348fd35e2bbdb3dea8bd3f6abce3b196267785ebd59271615493aff. 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/TCAFK2150242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37c3bbda0f2ff665196e3042240fb4914cf41917987206f3378bd1626dddef. 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/TCAFK2150261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956721152f3e5e1e17342d82be68e5f8cf100672a26d4570ffc127ab236f42e. 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/TCAFK2150302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec59781354aeb7381d10938b99929e5a579181c43692b5b1e163ff6c09196cb. 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/TCAFK2150310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402df58c70ad0163535b446822f6f63081bc446708694d754602a4a97cd843bd. 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/TCAFJ2157103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69e9f13186162a572fb16a159fbbfb689c822018139890a3e9a16d24cd7d751. 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/TCAFK2150325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda3d06f7541f5c9554a4a2446e859feaaf63a195031e187d4aeabd7d1bdbe4c. 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/TCAFK2150332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53ea0b0637f21775ad4c2943d940d24dde214438df131cbdd7a25912d49585e. 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/TCAFK2150339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e0c2de4aae068a13fe8664f908129b6d5236453b27929b17b8a3ba020c0da. 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/TCAFK2150356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31305867915af98ae87f30be7b7b50b160ba7d0401b6f459ef3e856da836bfb6. 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/TCAFK2150359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bc0eb08255c5534d017f59655320d914bdf4340014e52bd735787e5ba603e3. 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/TCAFK2150362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1723326226850ddc8b9ff4953b76a67c5c83986bcfa470847ba2f88a7fc04. 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/TCAFF2096881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9974f6cfad1f73d7eaabfe713006b9e234b1358823715c4fd0ed0233662b0fdd. 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/TCAFD2030203.