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 0x33ff2b6d7f3fdda6ca122487ea16e3e34c867d89097b811403ce0a17ef7eb30c. 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/f846e0fa-1755-4ab3-82d2-21620d1bb5b5.json and https://artists.proofprofile.net/proofs/artist/f846e0fa-1755-4ab3-82d2-21620d1bb5b5.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 0x80bb353c6fd92d58367be04eaeab532d914447abbd0cb7a9e22a62e50745efa7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TZA1X2000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501af1b2040196c725d44444b3057821c6b7584a4077e828aee4dfc4ca7cfea9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TZA1X2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7111fa0e026d044f838d9859b47d2d47e86c3631421bbc6905ffa1bfc7a6e5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TZA1X2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c91e4f904ff55bd69b80b217a132456bd157642ef434f2dfbb39c610e4594. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:02:41Z), 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/TZA1X2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1c0815d73591a3cf2e4387eca0622ff0cdc3c322201840e630c22103b2dc2c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TZA1X2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814fdc2b4b803efbf4f38db97a2be8ce3269bd04dfb65557220ab1361c50c94. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TZA1X2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a8d8ee5efeb473c9d04528c8a9a899c8f475ca79ba90d7271b3bad3a8b1e0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TZA1X2100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a8d8ee5efeb473c9d04528c8a9a899c8f475ca79ba90d7271b3bad3a8b1e0. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:08Z), 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/TZA1X2100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560eb62107c320794927b5a4e29d03b4381857599771aa255c3b5f19da12025a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ZA41S2225006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc22773dab0e5c686de2abf660c47eef68711e1fa8eceddd9e1d09a603d41b6. 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/ZA41S2225010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37aac2f48ae640fc6f40e494bf77984d339bbbda3fd6f372710a28e10a76f01. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:26:33Z), 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/ZA41S2301337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5394eac30012e9335e3da76947150c130bb3e6b7a4f4c064efd6b4992973b40. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZA41S2303875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb434ca91e6ffcdee47b46eed0d4271960c5e5e8125e4ed0c4de7cbc1396786c4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:16Z), 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/ZA41S2302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acd0d5e417c5040fbd5e9c5e66a420f2baf40143457e737bb38b87112f2e5ce. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZA40S2402108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d26698dccc7b6dce47a1a2bab68a4335452189a39756455a6a38f9df536486f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZA40S2500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dce0f963aef403216488e7ba15e50064924f6108079a8a1f51b3c9a0b87d51. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TZA1X2300795.