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 0xc27f42bcd43a282fa3a7e78e629d8b00a45594ffc0837b4f73c09d116e00933c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b60cb04-d7e6-4854-a6b1-160bd00fb537.json and https://artists.proofprofile.net/proofs/artist/7b60cb04-d7e6-4854-a6b1-160bd00fb537.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 0xcab457f1532fc990ab9c3aeca0443340f0e6947238dd9ff33aca292e72c1e43a. 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/QZNWY2329628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23332fb1f03338af8353bedec7b79d5cc377e96ea444c771ddad75d6436c7f8. 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/QZRP42374629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e53e4da3a86a7a3a0bc6ccb4b73ed9d9210dfadb1649efe99a94dbf641580. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAS2302539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb9c6ed3f176509f1e31abd212c31fce97d03133d2fdea923e44dc2b37423ec. 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/QZWFF2358479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1525f3411306df17a8324edac0fb8eadfab9bf19349d50b8f47825a78c9e0526. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:42:02Z), 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/QZHN32475996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2daccac2fe2d05e6906c23caa7a453c51a7526836f4ca4698563650d0bb50. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZMEM2396174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f2108f9dd03bf72286259a8c3bbe221257a526c577fbb1bb9904b980f1f2b5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6G2495216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a822915bb2ee572fb6157f94a368bfa49857dad7e28c1e94d95f1a99ce661f9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZMEM2480732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82c1b19f95182c1224c7795136332ff6b5e05fc02d16ba8b0c6687f14ed8cce. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWT2493401.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248816cb25aafc809a6ba13e6baa5122ed9bec04db5e2a6c6eb052810e8b8799. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:36Z), 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/QZRP52430499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90c9665307bd5edc8722a76f37db76c080a918b9b3c2e63290047ecf2b493eb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB62439485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18546613a33722d5703f7df2535d0902cd3997b02893693db59899212db74ef5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:21Z), 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/QZTB62482528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd538dcc91e86090fdb57c4a8ba3622648f4d4c49cf0e0ec02221ab16843e7da3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFT2468383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e7f6426c952b39abf29f7fdec258e7ca07b7897a334846be8f020781493247. 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/QZZ7L2464711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8abdb94ec4ce4f4ffa87637be122235889348aa1b905c9f26190341719d190. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:06Z), 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/QT3F22460992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a6b4aed894190822774fef79eb66301efd04e7f111a6430b8511afd628d3dc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:45:16Z), 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/QZNWX2574108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e6de0d93c860f8000c124830f8bcef5715ef1d7a470cb72b3a9608575970f9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:55Z), 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/QZWFJ2593079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adcdc9c934be12b91f642accca2fa92b69192841e0579114bc02fcf9f45123b. 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/QZZ7T2567563.