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 0x0f49c260cd51eb608dbedf074270e124b0caeb9e0c9e372161723afd48916b49. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e171d242-6d41-465f-845c-9649eb1bea7c.json and https://artists.proofprofile.net/proofs/artist/e171d242-6d41-465f-845c-9649eb1bea7c.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 0x41c2204d1cfaba3676ccdeded417ce558d86fe2066372ba5e279381c456b819e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCACO1654251.
Oh, Mother How Pretty the Moon Is Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed4c8e2da0e04c09464cd23a7508198b0c74ec77b471033ed48f9acbbf8f09. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCACO1654252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c99511c97369c7baba6342e0308c68d3e53d19f54c7542714d1d82c081862e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCACO1654254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea0e36e71fdcb5e3c2035cefcd34ebfb9e2488716e278f2e82173bae811118. 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/TCACO1654255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff87afdcc077d3b2f75efc0d2952bbdf9c1e0eec5d454a8d701937dbefe79e77. 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/TCACO1654256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e319612721ad819e487509e588fac28f4925c16271e4db0ecf39257d6202c8. 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/TCACO1654257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d48d50f995dff201b029e455b0a8ab1d0d463d1c65ac336ac6cc354cd54f55. 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/TCACO1654258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad37c64158fddb47f9e0e89135772f4e3b9fe3e61ca1ef957283feff8360a39. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCACO1654260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9b4a3e4c80d9e5908bbb35aff65f4de4fe3f0ecf90f49356f9f2d418d10d1a. 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/TCACO1654262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ecc0f29cda4d9dca17be5155bd66ce95984f6f7b289f3c5c9188380355ec8d. 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/TCACO1654263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b552aafbf88e12742f2565a080a4caa5c13402e44e1fbfd4aecd8ae921fb7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCACO1654266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0597085f4178ec713ee3fbf3a2a8bbc269315d047d9df6cf86a1790b0924668e. 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/TCACO1654267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc60df5f00dd16502fa994d1e27bd30160576b8c04a12fb9f30dae5d010fb304. 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/TCACO1654268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee3f2d20345775ce1eac546313ae20ff4a0f2e8fa2da9a8a7de998aed7151b2. 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/TCACO1654269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83fac6848a53ec942766b97ab73b13797e24b35bbdc907052d4b2330557c32c. 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/TCACO1654270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d490b3b665d8c9f2df1b68d6f5739fbf3db0bfc34cf1cf84543bbf29c94649. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACO1654271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051857dc6d078515e87c9ac84ed92393fa783c48dbca067579ac29fa546ca9b1. 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/TCACO1654272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c54de4fc915c16da972020a72e7befecdfd4e61696deca8245cf1574828e6c0. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/TCACO1654273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5416dfd3d220a3f3f434fae323a3dd89a81f0dca7a481aaf0dbf644e8f5720. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCACO1654274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2975cb1ac8c7dfa1d46e85c9030bf0bc0d7ada2c8db645f162d44906d205ab19. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCACO1654275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619fead0d972ad0d99dbcbf0dea278ea62e17667f59d96ba6f35f72d9aa82794. 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/TCACO1654276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00be1f84bced626095523ba3b0f51792cba70e7885cfee93410d28e356fd9f9f. 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/TCACO1654277.
French Traditional Christmas Songs with Piano and Harp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d574d187a469a097b7907d8b0c7fce99a818ceee15cf3eb3aeca0f94d21cb39. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCACK1513252.