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 0x19e58c702a206036b8f557362b3a1ad04522c9770ac8630d8b17041036904b6b. 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/aa437f77-718a-4112-8cf4-8d3e291e7846.json and https://artists.proofprofile.net/proofs/artist/aa437f77-718a-4112-8cf4-8d3e291e7846.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 0x8fc5e08b8ebd80cb7a28823fc74a9e09033b4fac503d5105dc09078544071090. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZAPG1742575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcd2641d962173ed7beda5995c60e6b8424706cefc590b36822a35dbcd24578. 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/QZAPG1742585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cedaebe725d4af99d70307459b685c93ef027f4527641375a86310a5bc0dc39. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZK6Q2057479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ab3c70f7955ae7057e4def269a73b5c978385f04c3339a96ee4aa270f4f99. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZK6Q2057484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371047478ea04ddbc3f6ccb06bd061ca97932c8e97bdbfb802d988ea99ad35cf. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZK6Q2057486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75960579dafd752616ccca97a4d73e4a08ebbaa93924a430ac771ba898856930. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZPLR2134454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1753043eaf774f89cbeb34561933e66991bcb08ec69e9bb060f5dd894d40b867. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZPLR2134458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a8254700c4188b60b7859b75b82445bb804b581bd44378e2428943e5f131e7. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZPLR2134463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682696003adbd57a2fc02a7caf7694f367e79d0218a9946bbe58dcd0e687295d. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/QZPLR2134465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8adf6987b5bc7b847c69541b6e4f36d1b6ba9b407a5a03536a4018ee379745. 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/QZFZ62317215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c25e49727e39443d168c3da255f578d0f4049f5b4787f823e7d287b40c4d5d7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZFZ62317217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb51aba5e7b57a593598eb3e2538b92039ee2849383309e34401255014f2b42e. 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/QZFZ62317218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccceba056285e99902818e8483112426249c3d7366d7282a499cc5407fe8758. 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/QZFZ62317221.
In Between Tuesday and Thursday (WNSDA Volume I)
Is Your Favorite Color Still Cyan? (WNSDA Volume 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb122d4f165b1bd5a2a5fe73efcaae085c0c6b4b0c3c0a07866390c8393312391. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT3EZ2564534.