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 0x0abe8069753599750133bb27e9d92fc1d4e1ec18c29e4456ef570f5a3bd2763b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80c6fc5e-2b99-49d5-9a37-0647dcb0b9e7.json and https://artists.proofprofile.net/proofs/artist/80c6fc5e-2b99-49d5-9a37-0647dcb0b9e7.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 0x915f5e751a39466014b0fc17024cab05f6409b61f071ef85d67ddecd4631cdbd. 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/TWAN79990023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dc3b40095ed857b199d387aae4c5119b89ddc932819182aa297fb4040fbc79. 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/TWAN79990024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47aab4ec66dbb1bdc28a798201e2c04e0bb35f4d1770fb6488652a0388da9a1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAN79990025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b896c0ac6750fae66697a76e2b99a9e84bac8a0d693f2ceac79e30836a8081. 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/TWAN79990026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf0fd55eed807d070ee78649f15a85ac96c5ef9d01577d53780d76416cb814. 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/TWAN79990027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8602168dc3827def5608f45a1f99dd14c99eacf02ae421aa578f44d683e84658. 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/TWAN79990028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d7f05fe2741ba987d6bdae33deb27d39dabdd03fdb01e8214500b52224117a. 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/TWAN79990029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c680bf3624eff53cbb5484fb56a298fa49a049c760dbb786e8d52fdc720cec. 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/TWAN79990030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d62cd9a663bf6262279e3daec5110d69aa2f27849305ef77f6b70e0f29857c. 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/TWAN79990031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959802b868a67bd276b8110a920a2009d87a7cbe6f9d8372d494a7967d753293. 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/TWAN79990013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880bf264d37467db5ede93d43a8d2bb0b9df3a10b10c7a1a4875150b3fe50517. 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/TWAN79990014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe970ce415b8ca80bfc0f46792184fa80811829cb1b12975d7399729b79ab7ee1. 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/TWAN79990015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f11323fe3d0757eae044167a4a91b05be0597a4b9c96bab0c7f9bdbc276eeaf. 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/TWAN79990016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e6c2bd4856aa219267db45126566b7681d1a8937f20f582ecf02908272c39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:57:39Z), 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/TWAN79990017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a57484c90b7dd2e09b2af0be73ae77ad6639a8aa20ac9dc5bbd2d6fb38d81f. 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/TWAN79990018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a55d7f733636aae97ddb791362a0d6f53452c6330a56d396cc8dceff0d90fd4. 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/TWAN79990019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7932d9e61aabe9d6ff6b237cca51aed6a067e1e8d16b9be9ebbc57381062805. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN79990020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af346fe2ef13c281b641a5cf8f054602787a7fb63d615f97b3a5a48a42e8913. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWAN79990021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855135f63f6ba1f99c76d8acb16a328a29395bcbdd1a3aac79d940657736198f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWAN79990022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc425aaa667e7988bffd56d75980a6621b0282d71ae04434f693178ac2c78908e. 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/TWAN70200525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa458745bf89973b06692da95f4cae869845e3765c8bf502c46e9dc61dc3ad4e1. 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/TWAN70200526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aea4fe4d5a7535c37bfc6fd16f2b0a56fdbf1142c0cb6b26eeb8dfebe63e34. 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/TWAN70200527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bc3b0843e117384dadacd593b868b54a5e6f45490c0e1ab8f0e23d5a91af2d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWAN70200524.
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