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 0x3f2da016377b9590fc06d802725e6396e84c032e16b6f44064aeda497a9e899c. 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/deda4e31-984d-46f9-ad0b-928cb93a87e2.json and https://artists.proofprofile.net/proofs/artist/deda4e31-984d-46f9-ad0b-928cb93a87e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x1770892136785825f4d25009d9656601ae92ac69e354dd09787051111ebb29b6. 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/ITS781702098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31676b03c71c04e11311a132f20c6160406d89167cf6e4ae13370177ebecf5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS781900924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5f8d76178a6234a6305a3fc0d06c8dedc7ed7cb680082b4a7fde0f9a14b74. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITS782300835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e243e77a1d4bd2f9a74260e7be0d0355d93ee481adadaa939022ed5ad654c7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITS782300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45765826fdc1e3b93414635947a8bf18a58b1251b9a51fe1a81bdbc08b575939. 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/ITS782300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3cebb1a5ad7fe74f387ef34dd50b70b964230c8bfdaf1c6cfcb061286357a1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITS782300862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0302756eaf4b2204dcfdc5de385c59648b120d6d9daf5f863cb1e30acfddb06. 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/ITS782400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015d263704aea3c809953609a612d320804f8bd8a05a11ac2a13a47d9eba6c51. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ITS782400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec8cbc493414a690393647462cef445eae4bdefcee657dfee5c98493f7b2b43. 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/ITS782400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60473c6f45f6fcda28ad2154f790d56b106fd92dcab8ca765138ce252a3d35f4. 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/ITS782400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fa082088520ad185d9b72534676f8ec993c02ebb845d89dc2fe68868ca1b8e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:43Z), 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/ITS782400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102cbbf1d99359ef86e8645b6df2b11b210f225f5f67ed899b9ddbe76bdffbf6. 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/ITS782400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d35ff4a9ea3b20da2615575bea45620aa215a739fbbb90763d9d472bb2a23. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:43:24Z), 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/ITS782400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62978daef6f86f406a0f4eb8bbb068bb62062119936a3e5dfdda95dcdd21cdea. 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/ITS782401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8270c6998b26dd8b73fed008a233f9f177c34861072fa4e090dc83e30f99a8e5. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/ITS782401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36535c752f7e2312f7f334e3e44ae2749da6283596b2f529513c32a116979fff. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITS782401357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d70e22bde5780e2cc5b511aab1303bd3966fc8d0cd1b44793da20e64161c5. 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/ITS782401675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb7e8b0c6c02210405f9182e4aa14fedc2d3310ef2356739d3daf4f216b8e68. 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/ITS782401883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edd2b5e8a817fc8a97484fd1240e6f873a789fe69b462e05a250b918e70ffb8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ITS782401938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b11b40a4d8aaf6825a7a5931f72efae04b90aa1eaf502b8e5d06bc4e279be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS782500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60144a66169502a946a5cb5c38ee4e49875a447b6c5519a5459f0828a56b038. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:55Z), 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/ITS781900878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23053f5aeb513882ecbbe2c4669d7825ad085b847e7ad1588d08cbc5046d5e3f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ITS782501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea7fbfef3e43b837e17855c8ff7a34067803e38a6824d3166e1b2c637f576f. 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/ITS782400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31676b03c71c04e11311a132f20c6160406d89167cf6e4ae13370177ebecf5b. 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/ITS781900924.