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 0x155b859de66ba3791593366ca373f9584417e94e2c30c501e21b6a5dc3754ce7. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a73f57bf-a9b2-4ffc-a330-8ce65c256148.json and https://artists.proofprofile.net/proofs/artist/a73f57bf-a9b2-4ffc-a330-8ce65c256148.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 0xa277f1689f89a966344dddc98ad1d5a496c11ff9f6ff85d0a08eade22033bdc4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM2PV1592354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac717f7f13afcf9b40aead10260fe8e74fbc4fe0d52931656a6596ecbdb11cda. 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/UST8K1520376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77881fab161e543d025fb321c3a0067d9e50699f67d20ae0b95417950583e1ff. 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/UST8K1520377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b03af4284505b6be9383a3247604cbec6fd2a5d53e3418ea9d7c4683137dd24. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/UST8K1520378.
Can I Go with You to Go Back to My Country
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8db73376a6bff572b4bc5e9108b58e2fa4d1ac85f64da96b60a415577ee4e8. 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/GB9TP1500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003cc0968ef632ea60c917d4d0f4c5a6bc8bfd590b2ea7905632d74cee98985b. 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/GB9TP1500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d329822900670e5d7262cc2843c57c549da3dd5ce28052486b381b39d7321. 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/GB9TP1500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d77e7636549f0e71b87ab767b1d2c0063bacb9fa5bb718187b291097757296f. 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/GB9TP1500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf385657c8fb53481419c7480550f21221bb72c4deabd0f287882f6241fcf6a32. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB9TP1500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4438896759bac6df47b956c24df6dccc5d0d5288eddb78a35d9696995c3421f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GB9TP1500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1d350d9d6701572ff322b868674a2c0ee2af930ba12d59a299d1b4e7cfe7b. 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/QMPKX1495290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09792be0d1a70cef2d9002cba9d6f5feb00886d5869b5dff90b51aed35cfbea. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMPKX1495291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534e6d25d36d7a56b69d760a3867d88a07a28c70d308a5a6880fd55b3d3877d5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AUDJ01300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e05821c1e04839bc4f0694218e19e2ab1559124b1c2a808241bb54fc45da015. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUDJ01300961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80a8f5978fc331bb2604b222061cb7ceb35ffc2febf53416bbfeff1d6e417cb. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/AUDJ01300962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09abd7ee7f2b189626f3e144b1d0c7fd8e90925f0f9814a226ca63b6b6db57b3. 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/AUDJ01300965.