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 0x7c7229df10651a0b4936b1752b9dfd8d29514a1a66f9e21a5b04aa7c148eaac1. 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/6860a4eb-e6cc-4ebc-9564-ff52a82f93b5.json and https://artists.proofprofile.net/proofs/artist/6860a4eb-e6cc-4ebc-9564-ff52a82f93b5.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 0xcdf8f1f0ca86e223aa1da665b4f5280c7d43e275c176120e120856a3d2705729. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UST8K1618900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302de256fa811924972b8531e1e762f5c6ea402306d7e706ece729824dbfe651. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UST8K1637198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97466345f931d3b7d93d0a1d357cda94d46379fa3e69de9ae494c67184c1c0c9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:17Z), 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/QMPKX1754533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585dd2b8b824a3eb76e29611affe14786b8d519ebb0d02db82e81aa1b081bd9b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZAPG1713932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe908847dbfc639a4540eca876aba426929d9f83f36a1c4de508a2d2e01320156. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1185141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf557d2bca75595069f4a0c243f53a2a0ea95b1e03b538476ec26a7ca4627dfed. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USUYG1185139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a44352ff2f5574d50513106931d1c89cfbc36604df221d293e6c860cb50c0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFX2194740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7734e738ef247c36b5a2d13392d6674aa938eb852e4d86ac89b78eb4c32a5731. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7811101903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638e0f543baf52ce0207ea45906e4f0c8e43422af1f4b7b04853bb03d9db7846. 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/QZTLA2383111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa986d1c2f1555f061735a0ed4830b61ea9479c251cd8cd13c89ea1cbb7619f4b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZ5AB2352690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c83ce37f1cc65b70d44f075360696f01958b4c1785f77e44de00820d432ff. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZ5AB2352692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb019f27135cd2132b37bc9222b21778b85d53af8700e159745236d7e59f68. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZ5AB2352694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff922208cb1c59d9664a83a97fa0051b15d71d17b234fac08fd101483a81a4d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZ5AB2352695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c289c7db79e49b51878241a992f22fcf30669b8af992a5328a04e658ac1472c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5AB2352696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d30f708254bb243c3087f1b6c62b601e934b65a183190d2a89817ee5a99d4f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZ5AB2352697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0530fbf51036c85dd9f987c8a711057000dd455f240624400cce92a0487933e. 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/CH7811110945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b91dec4ee3d3ad9addfd785f8ce7c927f5ef68e96c97c17bbcc256fd84e8213. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/AUGBT2547005.