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 0x95bfc7a732126e190f1a9c59d83c8c8cffe4d820645f23b5792449b51a1a19b7. 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/8c6a20b1-1f01-4c88-bae5-2b4cb91c4c68.json and https://artists.proofprofile.net/proofs/artist/8c6a20b1-1f01-4c88-bae5-2b4cb91c4c68.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 0x331dc5d810e64a25b291a85fc7eff87df56c9a7f6ea9301155407dbf11fe0ddd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTRX2222623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f28d684edfb950a5c29d1a8489d1c91fb3a4b4430fe1d9358f12ef1a0cc1c6e. 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/QZWDD2213360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375c7b85314b3d72e3b988753ff4105aa0805382736b86d1e3ebcb2e1e2278c8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWDD2227820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4963361b1c0e2fee314b59477ee2866f513f2dc2060829e77f8571314c7b241e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWDD2227824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf162c6da68ec7cfc579a3d05672f2fe9857abe84244ae32dbda04168908bd28b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDD2227825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229681ec1cb0992c14e10f27f1bbf42053ce53a8ee6a99fd450cf9668f55b8b9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZWDD2227826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67583c63c1645b229321c64a7e4f01ecd2aaa297bbeb3cb5c2890220c95decc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZWDD2227827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d193af0a0da9dd135e33e203b03e7e4844bba81f906ef951f9f4fca159c755f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDD2227828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b89ad31a5784d9a30d291d92b1339c4249c5b4d8fdcf1967dbca838d0f5c3e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZWDD2227830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a67d346204ef58da87f4d7ed5c85da8b17362c3a78b96d3c5c78d9594ff24. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDD2227831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac010b1f75d38cdf16201f03968eb3d8254ceda66c04a855dd1f674f72aa005. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QMR2U2112005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc217f67d75e37b278092dd2660107f8033dacb3a572e88018ac2cc646e034d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMR2U2112012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d2f02026eb6cc3753bc3f7fe066bf03e2dd30b9721a6739296e90229ac554. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMR2U1752401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d878a7bbd4f2c47eea4750fecfa61e66464fc564ccdd7b6a46d52ec21da4e0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMR2U1582808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d453eb8f83062cc694e6f04245ee5d6e6d8c7cd5b3ff04e1b6fc28624a1848. 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/QMR2U1222306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4562e977a71fbfb5aa5a7dcf424155eaa43290726ffdd77d75f621a2d1bfa5c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMR2U1222307.
The Coventry Carol / Lo, How a Rose E'er Blooming (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19932499095ca4d9ac29845934abfee8598356da1b4c39f04256d326b9dcfb59. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USCGJ1741939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b74095ea94db62ed533b740feec6a2ae76c4d7c29542d7259a0e96a035768b2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USCGJ1741940.
In Dulci Jubilo / Angels We Have Heard on High / Good King Wenceslas (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708954260dd755e4b4cef95540d9945bb268943088e03f429a03182945ca74a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1741941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e8641ec6eb2585b7884762daaab31ed4bbc9b76bd12993820a1b1f44c96612. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGJ1741943.
The First Noel / Ring Out, O Bells, Your Joyous Song / Joy to the World (Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea9fdf5dc509e66e6fd65412aa41f7b0c5ca2ec8b855e2f23e7fd137758301. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1741946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484caa95cfce0f24b893cb9cbbbf2269ffba738c8657fccc13dc98c02e71e239. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWUL2311411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1884a2439d6e4786b6fbdc5d806409c59a38033a0bf3e645e8e5466e3b0b37. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBWUL2311415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf745796eb76ed5855ba330142e59f24035c0c927b1b2fa4823d33b2d0404b8d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBWUL2311417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abf096e461191e3299e342d9a6ff807322ff9c1bf4c2480b9973b9c8e6158fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWUL2311413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332a281c4bace0afe7b1e01824ad9834d446aa5c54d6dc8a6cf98279e5945445. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBWUL2238786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6e9a5ea4f751c2f456faac98feba5f58fc26c4407496b868a64f8ae74952c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBWUL2238787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9a773ac06adcae63193a105c323a2d921de335071dd9820520740301877b94. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBWUL2238788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ed145025a1191bd9da1336c2379d2607012d56f85bef7c7d96607e0d1f7e56. 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/GBWUL2211930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4763a2490b2664cfcb5aedcd804c92bb9d53097e7233384b83d691ff8f0d911b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBRKQ2279769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ece5a56a3046387deeffab05f9d2198e14261ec95c97fb2a7bfc10cccb1ceb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMR2U9202120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b161f573a7c2f54578eb5d1c249b1e9d13f2d1b7a9daf30e91998e573dc8a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMR2U2221001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a3b2d6fb31445ba9dfa930f2a9663788b1b9bb43a82fc54e77ec7088dd8080. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMR2U2211701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405eac35da99f184d97f6570b67bfd5335ed2fb033855984046c5409bf34e78c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMR2U9202115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98323acaebf7e4cab9410534a1ce98e10030b2c854460205b4ee0295110e8f32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMR2U9202113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331dc5d810e64a25b291a85fc7eff87df56c9a7f6ea9301155407dbf11fe0ddd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTRX2222623.