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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 0x43551dc54774f80a7c82d4b7624bf12fd112466d539a1e0f05a7496155e1b2a6. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32f7d34b-808b-4156-9b65-47fdf9ed837f.json and https://artists.proofprofile.net/proofs/artist/32f7d34b-808b-4156-9b65-47fdf9ed837f.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 0xc6b87c96279d01e8b1cefe3de86f862692683b2b6bb51de770c7864f2d20b657. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAIX2459772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199af4b4b063ef0e43110436eeff6004be40112430316668e55d35293dcd3d92. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAIX2459724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ecd3cf4d6a5e38284c159e1b2de91e3894a9bfba883a92ddb79a89f3f6bb47. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/TCAIY2430139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac425347fc519d540db92bd7cdee952803b87f2d96cf99efdad2cbd5899faf2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIY2430312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cceca9f1e3f150efdbd5be90f404823af6022135bcb86d1a54e5144db8df22. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIY2430317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23c73df1b0679864eedf8e1648ec2d5a91fcd7bcf96d72251d7b06a00bb2fe. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIY2430326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb124e8adb04c245c9f62cf03ff8895c0391bf19295695264e219da2f4ff17f4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIY2430340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4760baaab175f96f939b0b3b417d29cf9eba0feabcfe0e5e82e6e4088bfecd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIY2430345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8622c9f746a1970ae7b3461c919fa68aee0a5fcbadd746989683aa6c8d01fe. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAIY2430349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e6e7b5623a1ced58d536b01513e494c3244683597ac29d3549d72df32be1f6. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/TCAIZ2430036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a7a1b82bbdfbbd89d9461a65f48731fe04fcd6439b337787d03639682e0d9. 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/TCAIY2430214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38e7c26a7df92963641ad2f9e09118358fe75000baab7dbadc22f8936308baf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIY2430232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a5ddb6700c08c26f2c3793f9bba211f252f7aa3e72d4163b778334d84f9606. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIY2430239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ad06711d196d28c95ae13eccc1a4a96bf81c6323ac57ae28f89842d0f6f56. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAIY2430244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988edaf52fdbb373259561bf9159372c6b8c4fc94615f29d7b144250ef53d3c3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAIZ2430251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccf890a7b39889f292117c9aa4288db218d6d10b594bad1d9ac36f58018e6c. 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/TCAIY2430167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c947cc16c6d5c6d3f6bf36c092acdfb882b64ba51a895695b389d59c63a77f7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAIY2430192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2167fcf588ed1285d9a63ca3b0c286dd28f8599091b1f608603b60d62bc44. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIZ2441203.