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 0x80dc0703efd70c9e7e4314a26631c05ee7a1010e610c302c5e8601107e25f73d. 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/a4101fc2-3213-4606-a1b2-ab3903671f39.json and https://artists.proofprofile.net/proofs/artist/a4101fc2-3213-4606-a1b2-ab3903671f39.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 0xddb485d82a3c24a61439890568e1039f2ca9c5cc30eaae8d0ba63f8dca2d7364. 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/BX1TU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efc59bbab967959a590eb080e6cd3312b6a6db9c66d986ad0250841d07ba93b. 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/BX3E02000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fed3583ce6bd66799d56bde35c42e3abc416215f58a9c342e2c55fd72ba279. 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/BX1TU1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e8a430ba302a0bc35ee474a5a808834e1ff2ca20a62533d1cf96c53c9d8733. 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/BX1TU1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ba1993ce4f12ddcdc0b61307d5a2e99244d32ab56503b361987efcff44312d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX1TU1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f701e20bceb3e8207e3efa95fecc7a3e12162f0d7a7a596740ffc71a59fbdb4. 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/BX1TU1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7900bf70d7e7c14df2745163a122be16a0f75c902ac157fda18b7c78f991761e. 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/BX1TU1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b56c729024e76d0bf7bd262daef90f45cee01b4bcd3fc62d12b3cae34a2c3. 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/BX1TU1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dec7ae874200b132e52486cce57a501a978a885c20a436374d28721b4018a3. 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/BX1TU1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7f8070ee8e987a37d53e923ebdba8254794c0af53839d3f8927542eca4304. 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/BX1TU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b27f66ee50735d8e5c77fc8e083f3633bac7a9bfdf8ad86f9d211d55d47d39e. 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/BX1TU2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2034555d58defc32cb1d31bc7eca85d4cc13797b414e4fb3dbae0654e21aac00. 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/BX1TU2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130c52ca25dd8bc2e04b1726e10af135474c744a7cd70275550da8e44763c3e. 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/BX1TU2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf09a4ea560665fa36fba8f6d30959025a089b8dca4be6d1b37378323a824a0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:43Z), 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/BX1TU2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513359b54f4b268a26feb2727a789ac4dd3ec50ecfa5882fa31eb07f69a4f757. 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/BX1TU2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1cb24f4c0ef982e0b5bfe1d027cb93f9b3c2b67ec352065b8b5d21e1ca8001. 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/BCDFI2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c77fbef9a9d43651436c71d7106e4c4e9693955d1e1a7045acbf1089a0827. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX1TU2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13e76a7ae9f9f6ac155efe4344994ec1475e94d7d3e8fc5c8c78d7d6d11163. 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/BX1TU2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd825e21d0efdab674eecb5560c1183705c4fea0494674d772060d4b1381355aa. 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/BX1TU2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdbe4751aba6391c84063429f7db894c1ecf0ee2fef31bee63a7ca2291c9a64. 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/BX1TU2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f49e5de78e0e2cca8d6f03d7616636bddf1bfa5743ef3dca72dd0eb20552d4e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BX1TU2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1fc7f36ad691e9fa36f132d2343e515b1a3531935d8521aba9ba27f6b9535b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BX1TU2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a257a4dcabdb57d1df2f532e6685324349e719b96a7072a05dea8025c43c9. 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/BRRGE1900903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7900bf70d7e7c14df2745163a122be16a0f75c902ac157fda18b7c78f991761e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX1TU1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdac0d9f43e8cf0d4e216aa44a3dba56f34500eb220ea3d1cc33cf3e4e118a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX1TU1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ee4df85f8f2a5391a58725c5aca4f498d841a2e0dced649384818f3eae6bb. 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/BX1TU2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7f8070ee8e987a37d53e923ebdba8254794c0af53839d3f8927542eca4304. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BX1TU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ecd2f503ab8c7111256d1a466d36d6202d5f4c8fcd513c13ae63ff669643ad. 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/BX1TU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f378592bbd4040429169eb811e420e8173b3c0aba40466bd103131a5ad50ce7. 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/BX1TU2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab192e916aaa5a0174afbfca1dbab87ba1a1f085cfdd9db68fa3d032f16522b6. 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/BX1TU2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917d4a2cb8926c706d5ca38195a1e376c0bc1b43b1ed8e780af24b8b928a9b13. 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/BCHIP2100001.