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 0x189f62c3900ee1e1df8677d82bc9464e75d4cb95b29914d9b3319d8342233c02. 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/4ca660be-4788-485d-8ad2-c24331c760e8.json and https://artists.proofprofile.net/proofs/artist/4ca660be-4788-485d-8ad2-c24331c760e8.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 0xb07658694410f667f305e35c7d434d5b3f1eb22c6491848faa72248c6a7ad6ed. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES7002044201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e845baa4a0ac8ab7feefe503fb65ead09d50c76a02f3db4e062ce1884ebe94. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QMBZ92057064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dcf481942ee0b4d5b00e551e5cdc8fc502f727c757ea684d2cf85c54bc8300. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFME2056647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eecf9a242a1211f06c28e1fae5fe85bc513042d854b0188c514e0a6ea28bb62. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM4TW2157370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab7acee9576fcf2cbefbbff3715a9902058d4c4dec4d9169ca25f85777554bb. 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/QMBZ92177553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0e41781d079b2b59e40906697555c310346bb53c1b4f4304837128bd6245d3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6P42101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd5a632541a26c94b9e73ac3b988fb386598f38587a3f1ad87ef9646f20aaa7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMBZ92177556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c6365768fa1113a698e8195834267edfc1643a5ff5304cc4a333d2594bbb39. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QM6P42173666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db5648526cb46166c880a66fb485e88f0d3ceda7b2c827c29d88cc26da3372. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMDA62257799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3247c408e649030ed4e427ee1bc372c6132c1090faf64abaf5a6b6adfceb21de. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMDA72256578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae34e6d04e419feb30bed5eef591178621359ed2441b77ed55197de5b2cd2e0. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM4TW2374320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a70c5a87886ae225589b8c7e27dcba4df1b790fd8751d5b0e65ec8943cae19. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2396195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de872aa8498f0e61e5ab164a6ddb0a1a8c4fa6d36b08380afca249a8055257e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TX2396198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2013e9719b3ace0861c93b7e434aaf1de97452106e0d2c31a62d3e73351b710e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM4TX2396199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa682669a4e5c22b920f8b0ac417a04b138fd0596152c19d3d234247f7b528b2d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES65D2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b27f29826c461b19933d88635e648aa8f987776d2b9c268b87ab81e2d9f46. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES65D2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2997ed951012c3a3a09f9b12bd1cedf6ef04501a7c2d4f8a86e3a8595bab47a. 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/ES65D2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc47cb4cbb5882603502e8851487d16763ff91479516d81f0d15cc17e3480c8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ES65D2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea46f1664df27d8713292b91f6e409f30249e4ef8a55ed87137aaebb4a6b3f6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZMEP2027577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e87b6a0995682773f76f8930cafc05860e86f84cdcb61690969fcef390be8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CACWV2020204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e87b6a0995682773f76f8930cafc05860e86f84cdcb61690969fcef390be8. 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/CACWV2020204.
Dime Que Sí - Electronic Ensemble Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06327b0fd7fa389ea883aa2adf097c167c7a4abab24db122696db98111086e7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA62208521.