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 0x31db91ad6ae1f6c1fb16f23ffaa87e21f46a8e4117abcef44de1174b980b05b7. 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/4d8fe623-ab36-46f9-94b4-af246afe1a27.json and https://artists.proofprofile.net/proofs/artist/4d8fe623-ab36-46f9-94b4-af246afe1a27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Death Touches Us, from the Moment We Begin to Love
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 0x5d741be6374095c5e3a8687b394452769aef8804e4189e051ea3619e6ef90e7b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX89G2327524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b830a7b30a56e946747ffe443181e8fabb209807bc1e5df5fe919e4351d1c9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX89G2306794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60583443181695d061dba8d29572b1debae1d6b7a2288c6567c0aa2f5d6f3735. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX89G2332837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b5711f48ed00f443df2f12bbc227d72d198e3a4d1e89a04772652f8271f1b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX89G2346805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e29e3b05c7371b999afe9b19c11d82519a95d2e84cf50c12dadcc0d649132. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX89G2395417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64030071b7fe233579fd56fd1872694fad8009f1b40c0d9b9669c3aa110c72f1. 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/GX89G2325204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978e9f6602cfaa5886ab1f902596c56db90f847bc5dd5c2394bd2d5218676a78. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX89G2337826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628aabf0466956cf831053dd9d4ddbac71d6504a089bdeee8bbfb0efde70dcbb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX89G2394907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60372c2ad10a2a04f060b3944edadfc8a19dafb582e5895eeef2748c1a8cfcb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX89G2339907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf04ccdea3a4c9cb656abb8fcf38bad02ad63187f1e95947cc85c168a56e398. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX89G2307225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4df24ae296abbc7a20948a0542fe74a8b1cd708e4267b310272168faaa956d1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX89G2379564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cb4f75a719471fb7f73dfd4a0f2abae61403fd8ef2b5bb66ba7e6b2098e0f4. 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/GX89G2374157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775c8ea9462165effd42005faae60f09796c21c0c00b0964deb8ececb7f6797e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX89G2398762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1916e483336a93ee7547158fb193e5c2f3f9d8eb040eb90d96640336bccdb42. 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/GX89G2391564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa9b51b1961b9f55a40c04a33f2b9b926c06298b369e4e02cf0b896f63952c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GX89G2398077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043f6cf3e5d19bf87ca890beb84059ae5c0f5382f277763c9f5f08559eaadf8. 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/GX89G2370163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c98ed9f6730c6e2fff4bb1219e30e618dcc593fa84eae8c5be37fe0a82857a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX89G2372992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065a73a4b8ea8d8700c8912e19d060b72dca4f066a31567c798faf54b13d2715. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GX89G2342148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d89f05edffff72342a9a6ebf5032bffd7998ec29940b9759298dc2088d93bf8. 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/GX89G2351869.
When Losing Everything Is Everything You Wanted
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bef3c96f98b0507f7dfcb5a1f9071abf6cc75e10fc8bf649b7036f2eadc3e7b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAAZ1176031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b94ed1255c00fbab2194dd64040bd355f6e9be229f86f9c4e730be166eeef9. 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/TCAAZ1176032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3b715933016e2c85585ac4c20c3fd2b0c2e02c6f0e7f8928a11e4a95c4c0d3. 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/TCAAZ1176033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1187b785b55b84ede7470517102cc6122a5888707252f9f3945e6cc06cb9df. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAAZ1176034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd51a02a65ea4fe0754c24f652bff96920da4d7b1abaae425854cb9f5af3c77. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TCAAZ1176035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d2f2b05605bc61d08186af95b05428664857292845917479a9a59c6ceca219. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCAAZ1176036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c02d40751418a438b23be58eff2acfc74dafa738f4e1d2319536822468a46a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAAZ1176037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f24923ea4f8d1f61e3ea14cfe0e7c6734464ab310db0f227b0d0ea735aac19. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAAZ1176039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc489a0f9eac11a281abd0174d075faf9ce5595785c95e1cd2ab71fcdc4e68534. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAAZ1176040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49382ef186c6d7acbfb08ba4b1169f03151fc0de4ce1caf441b79274d9f2cd7b. 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/TCAAZ1176041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222e0a45bb1f46d18290c6d0e55dac0cbdcc65af004c8f9aa58dc4177c5302e1. 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/USZZ81310155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aa5cc892fe39cb4a00b00148c12585ae5d56223149516a7dd67b66f485a9b4. 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/USZZ81310156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391c4c5302a175edeb407a930f3496a6ec253d5443389b03e0d242e9f6d106e1. 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/USZZ81310157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2850887ff54997e4cc00830ee57f3afcc6b0d082f1a2429ec48051392c2413. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USZZ81310158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3833269264df69fe142c5ad7d96827cbd509354f81dbc262356067c13ee8d9. 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/TCABD1247835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3753926e06c57283f92189ef00f78e265c90a11627e962b01ce7b78d33a49c16. 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/TCABD1247836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea298677b0c3f8e00fbdecacb12231106c875c49abd2a24aadded468bec203. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBSMU8083411.