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 0x47b49e2a1eb599f9d78c772c7ad9c22917cf99a5e4245e38cb2c47205687fa40. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cdae9a9-82d1-44cf-9b34-64531150a082.json and https://artists.proofprofile.net/proofs/artist/8cdae9a9-82d1-44cf-9b34-64531150a082.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x1765d9e949a883234e634a2a9784778e59e27dfbcb5e7a6d99a0d117056876cb. 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/JPR502138928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1766ba735b0285ddd05426babd0bb18d4c5bc0f16b900d1f58ec8125988a339d. 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/JPR502138933.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb57c1cbda9404fc63fda1c6204c5d73152097456bc185274ac3c6474ff38c8. 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/JPR502139056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc352a081311b0a9f786c5fb3e100730dc1e35c30b664efd73c13c8810831eb. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/JPR502139058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9b2ada4dc53dff0899e0ef11c06ed9fdee93e479662f384804bbccd5151396. 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/JPK630800721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b903fa24b40cd1993c37d93407cea5ba1a27b0e156d2773ea4c7f77fd89cbdd. 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/JPK630800726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f2b2c143b89260de3a022f228bc3642fc03274c239378a76d87622162ffa2e. 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/JPK630800728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5157e27471c1f0e56a1fae2900dcef9b2dbbe33bedef881ab1ba3ce83f3e9080. 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/JPR502149376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86e9b5f750377dccd08646a794bc2cd464b300457efb93ccb6b24b510dbaa4a. 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/JPR502149377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92772578ca5e26d62d157136148e5d0b9581a19ae4b03aa7eab5656b7cd2cd3. 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/JPR502149378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c43de06fe21f908bfd982b1fc91149cb0e4830d2f0d84fca348f749b253200. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/JPR502138921.
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 0xa22ffdc9f2f0fab48565d71054321116162a502e65794ebdd959b25ab6d27346. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/JPR502138925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6ffd050bf5a3bb7dbee887e218a42d76cd8643cfa6ea22fde81a447e34c426. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPR502138941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc891b316c4c15382a8d32f0d2c8d4985e9c762afd0aba7f9ebac4614d0e8193. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/JPR502139052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645c759b8b07614924d07b60b9841b8d319d905e01141c6351e348bce1db0b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPK630800719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bea693aa993d057bdb70e3098820b2c2e27d038a6f166fc71a1aa4f00ba5b3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPK630800723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b04d2accefecb9970684cd1bc5d11998e1ad9511a1b78ca0830d106d96ff72. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPK630800725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9ce6f3aa04983669f010e3c4871c8ad2e906b6b163462b06c69ea7dbc269c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPK630800727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e474af7f3670ac08692adf7d6f3ff288bd7b02973302e39d4d7ebbb9214d4. 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/JPK630800729.