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 0x6bd3e79e9d5e49ad6f0bc2accf46c60ac38a19bbc151d5d260e6f17eaa75bb41. 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/33276da3-bc8a-4daa-9b5c-fec5be9b4224.json and https://artists.proofprofile.net/proofs/artist/33276da3-bc8a-4daa-9b5c-fec5be9b4224.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 0x3210def74228cb1db291c8c1a1591f56ffa07a4b7ebbeaaf9aec021abaa7c2c5. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZZ7S2467912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471bca0c401c3e3cea562d4c22a39dbb7ead74aec97a2e7f728a5e5519739f3d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:08Z), 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/QZZ7X2494320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6617ca33552fa5ffa79e1c053369aa101b1e1c748ba8990c35c55e9172b8d004. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7X2494263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e709822427a071e9ff0de05473721e4450eb460acc933f02d457c29671a144. 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/QT3EZ2499730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ff0ed8ab3b16af94132e75dee83242f17763b220566740eebae037e7f1799f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:02Z), 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/QT3EZ2497772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a74d4a97da3a69993e754057884f42dc7ae72823768bd4f911b6c062ecb0ea2. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QT3F22421232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8238be36546fd4fc1a80b6d9e050b22e7fd706b2be6461fabff9d118eea5875. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ62537591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d0cca26005b5e24b09c680cb45456a0c134211cf6280cb0ccaac791bb776b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES92536506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959bc56a63abb1c3a9da0cce69b4deb4fcb77ae8975edad136b45f9a06883440. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN42556392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215ac49f079daa675b6d952cd8c0a5d27a1e470b6c002bbfcaa18a01baa681c7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN72510187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1db077285270af4e1b8de8d40a7fd8bf9d5703754d736ac6d7ac507208f476. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWW2534307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b0f6d10b0ab8fdd35a958402fd5e2a408916df7a7d30a4d2e3c98132e0314. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJW2582506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22796f2f932d71fee719b8ff917126a1e521e39ab4079910052e58ca983fc92. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCAJX2551317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d10bd76356b72428dd5a4abb95e48b90717fd292daf3c1535099140a0ae453. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJY2503748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef4742a576904ca13cee6a93c8a593ca8f9cca5cf6d5cfd65bad4e4b1579a62. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QT6632510060.