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 0xba9848703dcc3d390fc568ed1978e0d7589e8b4f3a7bdc02b91fc54994695df5. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9075789-505a-491b-ba4e-1d74f2eb6e77.json and https://artists.proofprofile.net/proofs/artist/e9075789-505a-491b-ba4e-1d74f2eb6e77.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 0xd586136bda299192249891937bea4960813df02c00db3c3859e614911a4f4b25. 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/GBDCR0700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d7bbd7dd4956d61634c58e89cf3345b9f83973f448727d96351a9f8aa2ca7. 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/GBDCR0700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7ff9e65a744cc98fae0b6b6c4ca3c1d70eb7696186f49d0ffc3af111a9a153. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBDCR0700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c56d33e55abc600d91a865a47b9d62a290f42cebdcfee58f907dfe0c92215. 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/GBDCR0700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370acc95307094a465bef178563e8ff89e1290da68681e231c6aaa600cde5cb. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBDCR0700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dafe9396bb5aa31fb65fb37d3cc1ee3d01a45a58bfd1e0263a50a98dcaa5fb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBDCR0700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833db61091a5ffef51cb2e561d51a32390dce3b7bff5dd8ec74b03ffd5729cad. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBDCR0700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4728eb18c8f6f64ae732d458df48970078c0011071fec6ae028f5c6447b19dc7. 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/GBDCR0700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec829df04dbee96ac0c53590e81d2e4543eade25748a3a0a1b765918d1bd0b07. 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/GBDCR0700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b691e6b24ce08d0ae36b17b1882e0d6714da61759c00f0f914e90d5c9f4d0e1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBDCR0700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b0791b821f99f1cc4a654e49adeb8868287313643df353b3ecb1cbdec2f51. 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/GBDCR0700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bcf614ae059b8b47b2c29da9179c7674fb7d6122ea3183c2379e90c6212b93. 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/GBDCR2101087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64e67ace91dbfd08ddcb36724a39db3ba6ee3e483190201cd306d4f4cb0dcc7. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GBDCR2101093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deeee3dcc9844badae40afbd8f1139f4181823fc1da38fcd7dbd52d34c28069. 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/GBDCR2101096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236af8e3e76677d488b0c7473e5d27156e36408324b55029b4e6a57232f56460. 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/GBDCR2101097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223c5798af640e2c39d938bc8bf37235bf744231d1901970dcb8e497092fc1bf. 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/GBDCR2101088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7519f9dc8de82bbb66f8ac74e3c34988fd11c6406997ccb0fe71dc50a3454769. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBDCR2101091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44559f7416919b41a80a518145f18e72d4306a48a4764291218cd1b8ff2fe4a8. 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/GBDCR2101095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d211515e93e8cd98a60abc307e6c47933bf7e953db0625a452c4b3351082462. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBDCR2101089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2c1b5c2ea5b4927b41ade9382127e236d457b05bfed77cb5e2cea948419e39. 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/GBDCR2101094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747291902fb6911ca92ae5a878247ac334ea176736d754765c438364f32f6a16. 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/GBDCR2101092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee1bebcdea59033e6904c45f6e7fab4ec4152775b61d6d01f2cbada3fa0f8a3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBDCR2101098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d7bbd7dd4956d61634c58e89cf3345b9f83973f448727d96351a9f8aa2ca7. 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/GBDCR0700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3596a4bb5488c7c39cd72cfe51572372b0468b072231d178a4d7ddcbd7ffdfe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBDCR1000524.