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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31f3e66daf80ea1573d3c2b5f52300418f34d2eaef0e7078ce28ce767ece28c. 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/80bc4113-9c3f-444c-81b5-d081e631ea85.json and https://artists.proofprofile.net/proofs/artist/80bc4113-9c3f-444c-81b5-d081e631ea85.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6b94e21702bc72824313fd08437fbbabe7620cb801227a81a03b98cb0cbf2c. 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/SE6TI2376445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b9e73baa8552cc9a0b19dfa3af77d15973856837e248bca3e19221ab750bf7. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/SE6XY2306241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784e14ebebd8e582a9ce75a6e613bb7aa57b33219339d1e7e7c75aed3fb0f6f8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE66N2325929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fe1f586b4dcdac84d4f5c256eccebe4e9c5bc01ac3caa5c7cbd0ee81c3b34a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/SE5752485596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f70e60339454c41af52899c80e5b35b17449ad03a3a47002560777a5145cc7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6SA2480153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c48f1d5f69faab4e473a511aae1638fd1b3b81d31f424de27dd709f8ea6e53. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE6SA2480154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb788bf830d28243e11811dcabf9b86c7b4a2ff6d5c12cabc0fc5caf3d28af. 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/SE6SA2480157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a3a8c26211da548b710136dfad3b21d1c2934440df0d874364a3b53a514e3. 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/SE6SA2480158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ecef6c18e1bad76a2460e4c94159cd6d26027434f1515171337aad90162abc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE6SA2480159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5cb1688f2b56fa5c6a99f9af2fed255e2aff6c3b1714af613020859593d7cd. 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/SE6SA2480160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092288cf29b21c2c2d5cc0e20423c4cc849a18bd7ad169be38fa3e4734844642. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SE6SA2480166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c6811d9d9f6bcc7d2ff557b078b88d0222fcad69ac8d2960ce61353d95af4d. 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/SE5BU2521942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ea211873ae32b708f3be34f2c8b822598b709ab71964d858d98a173a00237d. 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/SE5BU2573567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31bb64d5a162bc6dc008d101a529bc96661f97f56b1eff7bf7642fe4f3c9beb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/SE6XY2538682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80419b85baafadf4c28035e5464884d5f18f99b4d1521c92d100ba3b4ef9ff6. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SE6XY2573029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162b216e2e24a41329a5ff8da898f39e54572bf286b4fbd25d4c3f7e00276429. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6XX2547643.