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 0xde70aaa55bd22dc7bd7dc71043edd73e44f3886b53a214740fa73e3f9c7e45c2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f98a0d-68ef-4a01-876e-e8539e0656f3.json and https://artists.proofprofile.net/proofs/artist/b2f98a0d-68ef-4a01-876e-e8539e0656f3.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 0xe9291ba385ce32c9f4c3bf295505f3e728806659b177d5cc2efc40287ba882a4. 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/QZHNA2091166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b02b5bbd0b8a1dac5b82e481388167b4bb57523a7799f3ecbef4de531ff408. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:10:35Z), 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/QZHNB2091400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5950ced079be13c87592d4f9abee0368dbcffb4fbe6f4e152ae652f7b2691463. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:34:13Z), 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/QZHNB2091412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ba054f0b0ee7c829e5ff4d010fc4ae5d929bfe6d3df5b31f7d2ad69b3b3095. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHNB2092315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74275bb3d81d1b81603b66027df54ef1e68b75e6d710c39ed4d4d56fb057e23c. 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/QZK6Q2026639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a5812c97722ece6d8602080edc919bc3cff6f42cd732c376a7d5ba89da84b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6Q2026654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaef531d18bd19facddd84dc68fb083856840f45642b1dd9ba19b62762beb40. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6N2072205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2125f3d87d6d18d562a9be5ec29792b7cd0d2995fb5aa8c5fbac94007eb9f58. 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/QZK6M2085355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc22d9ed2794ab424819727639b117533b1d3d89c295798eb045b810505c7c1. 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/QZK6L2039062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083c1c0989fa625d5cf9f61492bfac7cd79a3f41065968e6fadfa7e1a69e11f1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6J2025286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c138494f0aec9a4aac7808c188ef923dd5045a45ad8bafce8e2a4a7d53396. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:41:57Z), 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/QZNWT2009435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae414abc9a059b3b48ee57147d047e25370b598ac939fcdfe40934250f8cd8c. 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/NL4WT2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bda56be3ffd38dcb5fdeb4e597ecc3add8e678d48921e556ee4a6979d31875. 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/NL4WT2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc456d3964744c9ff1b4b91392025775f55106fc3d5f2bcba0658a3ee6e907eb1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/NL4WT2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8094e64b13d55cdc113bba3670871cb6be2a8cb4978eae8abe91660fdf11de04. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGWX2046814.