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 0x33d721432e1bf815dae88c3c19ab7529fab6eb324c8b16ec8cbd97c328dc93a2. 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/e63f9e1a-bf87-4995-8e8c-ab16197dc88c.json and https://artists.proofprofile.net/proofs/artist/e63f9e1a-bf87-4995-8e8c-ab16197dc88c.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 0xd3f11d6f9b89cc5a3d4f53089ca216341e21406d6ae56ceb99482d283f2ad851. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIG2460075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384321d73eaa32dfa24d623686c4c68eff652feef4dfe13fc17c5fb3c248b8f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIH2460116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb7ce6b02d3ebea5f2dade34767de1cf3fb20ea4b7051a13ebf83030a7abe9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIG2460239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1470fd406905a9b7258fe2b5d139446b12398c680b1af843ba9c65f8c24e5e19. 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/TCAIG2460273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23028662ae3c290c3565ef8d953ae79306c781e91dc2ee797fff47c397395096. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIG2460284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00438355d1402586c882e2c1d499f769c5a2d6e9c028ad45ab2b70839a3b9559. 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/TCAIG2460292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7803567bc3713b586797c933887378c8fe23151139252909be5aa11947695a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIG2460300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4567ab3de082619a626f4f18d82251d928ea9cc5186840138fbffdffaad533b. 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/TCAIG2460393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bc0b372a0cf47ec5e73aa41c85e17544e8b44e54e5a35b7b2cf5348c0eb80b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIH2460398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4aed5d491ca3293b22b60b67e3beae35c3e4c4fdf769172e8e681323c966ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAIG2460404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f10d5c4c34bcfbf323a9979ad997236f7a24da2c24f3f11aaddd6a40a618d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIG2460436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65fbc29cc47828c8cbefb8df548eabb6c37be2a24e613116340e81062cd5bf4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAIH2460452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b6f1095d39db1a678aa7dfdff8248dd78098458c38e6aa0b86408fbc164882. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCAIG2460465.
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 0x88764062de21ff7d8ab8e0b31862c428e4ff9a85286ec9dcb6571190862b2f3a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJN2547417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80074d9afc447fe5631469a00a540faec4015c26ad74284e64a13298d8c7b03. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJN2547491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4a3091879abee6580f01b8e7c8e1aab21f0e993498f774deba54be927d0d59. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNMX2280065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb03e693c896ed6587b508b0e577dc726b45b46725bd2bcf65ad432ddcca00. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNMX2280068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33abf639ddb11c3defd7426e3a3ca07e989474a3510f2b666897cea769b369d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNMX2280069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00b48e6d626b0f7391b9e2aeda33f37301c2485e223fd73be451158d2437273. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNMX2280070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5d807459abffc42b6d25cb546192626b9502d842ae49788697599d3dbac0fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNMX2280072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f839410f6caae704892f00791ef0f09bfccf79ffc3cf1ea5bc93b3d8fb6404. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFG2323737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88767aec8d629a6154c873764fe5c7d4aa6ff9e821cb2009ed3a9c639eab35f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNMX2280061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb919207978229cadc9a48d24706665609c2c3a2e06e7e73ac183095f1535c159. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZNMX2280062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9e5a7b2b8c4f57c99b907eed773a351778d2efcadd65cbb632ea262207a3f5. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/QZNMX2280063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69ff8b8531ff108e9b5764e44b83dd15b2baa5298e6962c810270833a0224a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNMX2280064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9880dbe5dd285012021c5c7830b6b03b74bf6962e741b0a9f040b8ae60196994. 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/QZNMX2280066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375617d6fb4b85bc8800213e8f1721bb2758288cd8cfedf8ac15911edf048efc. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNMX2280071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cd11ba01b0e440b38c511daa6baf4d335dae330cec8e23d29da65e35b76795. 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/QZNMX2280073.