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 0x53cd45b21a3b22049c0f1e63baefcb1ae488ee35e095989bfc2b05fe983dfd19. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6f0d46e-0a27-4f5f-8d80-fad34cea4983.json and https://artists.proofprofile.net/proofs/artist/e6f0d46e-0a27-4f5f-8d80-fad34cea4983.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A.T.B vol.1 instrumentals (Liverecording)
M.:A.:T.:SESSIONS vol.2 2023 (Liverecording)
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 0x89ed168fa6a07ebe17e01d60c154d05538a348cedf7c1236704f3e4c2414835e. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/CAENV2501833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d41652791b1714ee6687cb5606168b3c8cedd85d7a9b1040d3cf0c980d8521. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAENV2570424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a497e677ea345222370acbdf262bdfbf9a3e194e4b06ff087848e90ea61362. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CAGOO2523341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fb5cc2e73707d9df7ca57cf53aff1118f4eba70cc73a61921f9bc1ecc037ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAGOO2578715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84e69550931a3ed8c4295f77c59d0242701057d7207cd6452d62a698af8b364. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CALVP2507916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22692a18874a363d938bf14b38b17bb60aa0df7840d1b1059b595107b0a0b6e7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CALVP2528283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b8c9712e1a5c2aa289a3b883b810c9f965ab3860b6b38eaaf56e5cd9bfd25. 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/CALVP2557310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b76b9de1d00f8cd16e0e7db2f3a0ee5d7c9026fb1bf63613147fae6b52b1c2. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CBEYJ2529421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c714b0583cf844c9deae4d20926629df054bdd43422d0868dca5a4752ee2d2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CBEYJ2546809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861bdacec262145eba97e73d237277d528cb07e7ad4dd6c32cbe3bf3b7fc3293. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CBEYJ2558933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90712b1e92f11fca91a0bd4b55cf9935a5320e36a7e93a950a38bef5edcf286. 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/CBEYJ2567201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850d544502f3c553bdb2a7074e147afe0ba93c401daacd588432f3e10bd7364a. 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/CBEYJ2574870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1edac84703ed3fa97a416389a29682904e335d68d53d8922e766e965ea67765. 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/CBEYJ2585765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6cc3278807244b1dabe7442f2c63ff9761022b0b8ec456692295af8882abc. 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/CBF8B2500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c51cdfd8fa88483af86d66ba5d236601cad4c3e66aeb58febc9257ccfb51101. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CBF8B2506182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd8beeed9219841654c7505f83549196dffa1d30981e0b6e6b91198796cc79e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CBF8B2526023.