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 0x41afb6f63a0fc9b0cae26252fdf9b803b9b3d69d3b9ddcf7476607f76109e141. 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/434cb378-8a63-4ca3-a172-e2f7547755f8.json and https://artists.proofprofile.net/proofs/artist/434cb378-8a63-4ca3-a172-e2f7547755f8.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 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 0x6c5ae4e53229262dc7041dbf7b07b0319bf6b5f537ec726f8e986db146dbef5f. 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/DEZB52410548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85d6981cc9364a8599585c83af34a1c1b3aa4ce7c4b8b2d5f4958b9bf280a52. 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/DEZB52410549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aa1e0fa106c5bb34718d05703cc4555df32f5ff5c3647d87f5aae0c4346f82. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:15Z), 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/DEZB52410553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851c909e1350431af6e002d43829afe08ab31d8f166cb3a426c5abb50617afd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEZB52410554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8adcaa9547ce96e4dae563c94c23e63e4e1d7eff418f35ac6eb161468fcd060. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZB52410645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217b9b26f16a8ab9836925b7e274df38ae0492430207864f17a444b2c55d17d1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:51:02Z), 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/DEZB52410653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b80b87dc7cb025c82107b764ccf14242775c53b2cbe8eab0ca1efd8b7d9fb9. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/DEZB52410654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961355d1d12a559f9012a9b7674eacff3d2fa3ef549f269a1da9d80baea6d6ae. 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/DEZB52020176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e45eb6628de893a77219845b16b57375e3a50b16794d232d9fae4f30d9d4bb6. 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/DEZB52020177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b924335298f7901c86d90b703cc1653bc8bd8dd9c975d445fee0b224fee8e7. 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/DEZB52020178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf033bc5921395f3f22280ca401111a46157f5682ec23c6e489c475fb045d6d6. 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/DEZB52020179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dcb677dfbe65b1957c7d381d338b97401f9230a5d8b5636c5ba9da0d002255. 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/DEZB52020180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512629796d63f67d9c7f61ad8b1b6b4e24f493c7d3767216b0380af3d9c2e9bb. 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/DEZB52020181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba06a84ed04156ee1bd277ab6296681726ba479387b1b391038ce2fe81b578. 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/DEZB52020182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeea104171df7f56b7486370a7646e35b81d91daeed0bfc45e48faca61a3b7d9. 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/DEZB52020183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa352d8142d0ca398aa3ab5a569c6c31bb228e2793b9cb74c379690d2929987. 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/DEZB52020184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5668d096255f0c28fbb961327d08fc135436d8ca90ef5d864b7bf1cc8d3bb73d. 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/DEZB52020185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51feb95e47b9f90f4091413abf15af19104bb712a26bdba5660bac93eb96420b. 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/DEZB52020186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f82cd70847df92e5700c3c50ea240eea5d43685e7df6ede94ff0e30421f4c30. 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/DEZB52020187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c51db4ac64118f5ad9612d8fcf092fca533e4b7b73ee5ad6406f26b6ba2b42e. 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/DEZB52020188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090adcfa1b405cde468c3157d41012d85cccccce9494b7c6d2d38bec8f76ef9b. 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/DEZB52020189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304bb3ae0098db4845397de5c7f9bc67a7c094c01e4ab613435a7bd292f82d41. 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/DEZB52020253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa4f6eb3601907eee720cb4d6ff239b2541e45648a0950fe84551fa48d61566. 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/DEZB52020254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee8168dab978a234fff8bea29feb1ed679abf0666fcda18380fa0693ab531a4. 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/DEZB52020255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e012fd8ca0a3ba886121a5e05175346f37d814ae5ba6f16cc82e27e58ecba. 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/DEZB52020256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33246e32cf3a2446c2d01a8d13a54b5358700359e3cdaf3cd855fa08277280. 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/DEZB52020257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cf8c43c112e0fd87fbfb05fcc5f98105a3e4db7f863dfec1d7923d1e7816e4. 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/DEZB52020258.