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 0x517a907d31b18c5b202c7e02501a92dc7db0dcbf3f007745110ec48125f09bb8. 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/d7ceecd1-c9a4-4947-9cd4-6ab6dce27fec.json and https://artists.proofprofile.net/proofs/artist/d7ceecd1-c9a4-4947-9cd4-6ab6dce27fec.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 0x7b3709c20046da0d0c11573449ce35f90d4b64bf9164e9c286c46b4b87774db5. 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/USLD91757581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724c39f6e15db20d43ca108bbf2155fd849cbf69128ec31597e4de59586eb61d. 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/USLD91755895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f3857c0f57378715dc8fa4f06df67967909967ad50ebc50adda9f2c46fd07. 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/QZTAY2271751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a13872a97c5a78bb580aa743a4fd32f14ba33bdb4aca8fc4e25dd3d99ebb9ed. 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/QZNWX2249883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e51cd1a405d236cda493c54e1a00a703ce995a67dffbd125087b27ad46cdb39. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:52:09Z), 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/SE6HN2165990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e51cd1a405d236cda493c54e1a00a703ce995a67dffbd125087b27ad46cdb39. 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/SE6HN2165990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f2c24a319bc2ddfb430652a3b74212abdafae17a391cdf6bf9b8752381802. 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/QZDA42454496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbac584a4591f86052e7f92356a9663e8bbd347534802d69374b7eee1c97e57. 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/SE6XX2325857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09695e138dcbfa7dac07d4a2c0bb111f7c7c73df407e724f5333de5acccc763e. 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/QZMEQ2361544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda094c4f67d637a51ee1b71ab1ceb157d9a9759e573dbb9529b707d7dcfbb4f. 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/QZK6L2341082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5810d433cb94c0a08dbc3a0fc99d06379b20c6c963e5ee2c0a9181bff79464. 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/QZHN42363068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3fc7a138b659eaf8e4aedcd4c243ec53bb22ff2ff5267820fcbedfe26d33f2. 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/ESA092306247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b98e242338fc115a2f790cfe007d5f11858b4118ff9d023940667d3732248. 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/QZTAT2205300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c78fb6c6099ac2b12f9da34e0d6db13163609c59902b80c0492d9a387100943. 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/QZNJX2248055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d79cd525867837948ce2f708de1adb719bb74bef466e044da2e64638621d6. 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/QZES92234833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665771a4f47c8e860ae322fc3e1c7b3220a694365be9f206a592ddd18c9ed92. 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/ESA012224763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9232ae5dfdfe872f1fb6f974dcd493300405f5ead1755388517a379915c080. 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/QZK6L2180762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8ed8de3e44df2608c28941f8dd92c008c27d51e4f7e3f6c021113049e28896. 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/QZHNB2142566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35391f9c7b7961fa972bc6905ab6ec6e26a061179c3ff2472df2230a7482f86b. 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/QZDA72225651.
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