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 0xaaa3ad226efff7f61238bb88b1304c44f012bb9a91e60e1dd2a0fdfd74da3104. 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/cf070c8c-ad92-4e2d-99e2-413017e8e853.json and https://artists.proofprofile.net/proofs/artist/cf070c8c-ad92-4e2d-99e2-413017e8e853.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 0x6f3f85eaf337f4bd2ef54a7580288bc6a8b50c59a9b73135788fcb78fed9ee1f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ZA8EN9800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a84e39bc39b5289bc925734a32271434e0636b726812adb6e226e5a14a8c34. 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/ZA8EN9800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a22d894c30e68a8ce5c054779e05b246d06f6a7c95384cbb86810da28ae5a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZA8EN9800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc212cef6ce2361e8dab1b6dd347e2a2329a2f165f3777cd638daa22dede4717d. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/ZA8EN9800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c5285aa8312da42bf18b3405953504011f41efe7affd3355acd871563a8740. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:48Z), 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/ZA8EN9800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd558dee0260c7e2e016d53e23fe20efcc39a91f396e06cb2d71f170526ca37dc. 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/ZA8EN9800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f0bda5d6013b2c6f3757e4730dcbf58b3b8d004d86f6135cafecde5a82972. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ZA8EN9800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8899ebb1eaa5f333be11a510efc10d3b8accf05262eaf455e3f8c6e5e4eabc6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZA8EN9800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf0c067e1e91cf663b32c0130639a8b8b40f1c79e944915ae1b180d677087b. 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/ZA8EN9800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1670b082e9de167504f6d1c76e03bcebcffea962389299bef03c4f35308ce542. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZA8EN9800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d371f3eff4285babae9df001d474342a66878fd285341208de9a09e01fed45. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZA8EN9800015.