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 0xcd9d9cbf074d23d89229d323b911cf2aa9f021b6094cd25b0a82a1edab36e330. 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/45983e92-6005-4277-8a3b-22c0de0e19a4.json and https://artists.proofprofile.net/proofs/artist/45983e92-6005-4277-8a3b-22c0de0e19a4.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 0x461b076a2cc6948723a2d2b68d7e16fd4889bef02a52f9fe85288a185b35006a. 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/SEBAA2302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e71584b9d99d24d22c3d4a8d9c414e77c550676a9ebe09afcccffa0745b438. 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/SEBAA2302902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a26627c38ebf39f0b6bbc0c8d71c704f371567a7a50d17ad94a6882d254cf0. 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/SEBAA2302903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a609bd44294e66f1924c35eceb370ee2084a85c67afac6afcb51603273a59. 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/SEBAA2302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c549cdcbfd156f151dcda5f5620fb984679402698321ef34fcce6477ee99fc. 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/SEBAA2302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6294f33e3a3fef47e9ee71f021f6b0927476e4ecff257037945213c24c4ae78. 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/SEBAA2302906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dbce595b3c292b93a48769cabcab5c5652d8772a7b4f8fba220570e84a3578. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEBAA2302907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583e71189f845c12257ea564a444693b1fbea101305cd6049db393f7e962611d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEBAA2302908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d38c4bea4f860f2f8aee43bffe3ba1153b95f2dbc07108c50504d5137c11f. 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/SEBAA2302909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91c643372951c95a9dbe47bb2b4e9175cd87c4f9fd06520ccbb3958d405ce30. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEBAA2302910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502fa20fcf19f979384693b6cac344158d418e4278f8eb9b7195ed6583a213ea. 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/SEBAA2101401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb05b234d6c9307a72343e448905a412d5f9389ef9f0169c964cccbb6254da3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEBAA2101403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc396bdf0d49d0891b557ee822449878a14435976a2bd447dfaafca51e9df953f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEBAA2101404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46b9c91bc57ae806b3c6972fe9831647f7c6660454a6d492fdb60307c65e0a. 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/SEBAA2101405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad4bec250339aa964457924306fa7d71a454077df791a4525adad0b96227b87. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SEBAA2101406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6940f53833536c8580967bd1fe0e33d44ff63db94c43fd8835314d25fa0b7516. 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/SEBAA2101407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ece93349fe3b2260166acf193f9bb678b20a0a91aa506ab17534cf3138212. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEBAA2101408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b91eb58b236469bcdb13b2199455253c36e2632fcd5ca785546b98b18ac0a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEBAA2101409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930f47d565c575e80c96cc594a598f0cfdef87351fbef0f55ae50dc88ce7315. 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/SEBAA2101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a609bd44294e66f1924c35eceb370ee2084a85c67afac6afcb51603273a59. 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/SEBAA2302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b076a2cc6948723a2d2b68d7e16fd4889bef02a52f9fe85288a185b35006a. 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/SEBAA2302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502fa20fcf19f979384693b6cac344158d418e4278f8eb9b7195ed6583a213ea. 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/SEBAA2101401.