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 0x40129d1506bd86521b860e59949340ea7b99105424dcd59d855b94f401d90326. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b42f26de-8c68-4eae-9fd1-c5c7e2191f4a.json and https://artists.proofprofile.net/proofs/artist/b42f26de-8c68-4eae-9fd1-c5c7e2191f4a.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 0x10e27353ab645fdf4900037de54e784487e70083bdfb93e2d6abb5d7c19cfbad. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:15Z), 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/QZWFL2395433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763765b631141d9a463267b792ab991341e6fd31669d01be1e92830f9bdf937c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTBE2425647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6887365fd8ed37f4a985780e3b379e737bb979af29598659d574c87efa6d04a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTBE2425648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbec4d14020c59bd8a2a719e3c6a7e7d00cd2dca6e786a77198c022afc3dac. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTBE2425649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4558973103bf21efd7923703951d9d0950e54ba3b6401bec3f6e853232e2e23. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:23Z), 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/QZWFL2457149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae355d60ccfde285122515853effcca9758ea85df5a1b62e4a310e89f50f49be. 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/QZWFT2478151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778bfc9eb57b5d23cb251ce0145d362ab9fc2f84e02ea2a597bd8ffcccc1fe5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN72302628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc3846dee8026679f6d541ffe2fb47e52f07bac360d3bfe075ace031e4215cf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7Q2495203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540dc994345d933f6a6ee817bfbcdc8c7cd5456b3156f0f61a376da3a23d849. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:58Z), 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/QZZ7Q2495204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ec95e14c66ae27efbc5dda7091d3eeee2bd88ac99218da22e29ad8aa612f2. 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/QZZ7Q2495205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8aedd2d999c92233259e0d0ed290fa7a38be2fd51eaa7f7a9cb03877886675. 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/QZZ7Q2495206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd222bc40ab47943cbffcaa9eaed8398a7838dcd78b2760a319cf08b874d720c6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZ7Q2495185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba87fa18d3b39e998dd8fa66c61964d3603d0258ab53f16ae880d8c5590c5e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7Q2495186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2049f8cbc55fd96d278b0ea43455968e5442173199d26b669f486a2069256609. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZZ7Q2495187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e325214bf54aac759e29acd41e62ce8d307d1dcbc7e80e64af06432b9d8610e. 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/QZZ7Q2495188.