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 0xefc2935f9d45f67ff787fe0bff5be795d011faeaf10fe9858b016251a5891af5. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/742c3787-873e-407c-a98c-05813c111d82.json and https://artists.proofprofile.net/proofs/artist/742c3787-873e-407c-a98c-05813c111d82.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 0xa66bdddfc7ec4a6e910428bd259641941bf8da52e533c0a9e4684ce318aadc4f. 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/QZTB62527129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301872ac56f1eabf6819a998965983ab2da5eb0a0f947114c83ae9b1a941d540. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB62527130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aaf793fd1cfe3042c2a95a76da065c3ce0a7be03c151a31fdc896e38b92a4f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62527131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7354df5db4f822223ee071557d7019e9cd4680ca7f3344a37d39ce6fdbcc2d88. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62527132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1196d0fb5b64c2dc5e09997a9a82e04031f24a08ec7e151a90ac4f9c003faa7d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB62527133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233c4eb342685517655a3fe14a5b3f0ce49b2de3388b45fccf687b0af1be993. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB62527134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c53f0943e85acd9f7b748bdf31809e7a97d67d4d28e09708364f9ac19e8783. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62527135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c638f935f27244720863d9b5f62d3480ad0333f46ca0d73e421a55641ee719d. 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/QZTB62527136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0be346476cc37b70dc9a824578697636c1db2dd940a66f051cf431b9d0e35e. 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/QZTB62527137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8f87ccb3b110a510edfc8fb4b18633d8ab4737d0db00b2f93c02c954f81199. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB62527138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4860450a8d80da1865a4750193c0ce4110ba2c234187c6ef594f6d20cc8bba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB62527139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99f988fbd82e5c6ae7e1e76bac58d7bf10d2ff0dedb6a1babb8d1add3d6e88c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB62527140.