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 0x352b57d568b6039780bacce92b6198cdf9ae638ebe69130adc946636d25a6a8f. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac93d90c-25a0-4199-835c-ab56f54bd8ed.json and https://artists.proofprofile.net/proofs/artist/ac93d90c-25a0-4199-835c-ab56f54bd8ed.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 0x95b0b72e4a2a820a05520c7903945219d2e7282c951866c9f34d5d1a0c7b61b1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA82213841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891a31c17dd0862fed910d71319124069129d9bd1a4ff9040a958adf736ce44. 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/QZKWA2035910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce63e6f5cb92914d87c08e4e25a5832ed4c2c9b0ed26accc80aee6d0f670f3. 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/QZKWA2035909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15210e325142ed4c681289803c27ba53634b9db1522798b07551bc161fb6bf17. 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/QZKWA2035908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c06b99510b0ab8e0d70af4239fd72fe1dae5c45c0d45da1cd56799bb88570. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZKWA2035912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0689a6d13aaff73f5288cb8eedfa86f494adcff217043a60274da91512caada. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZKWA2036019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf523d50893a54ae6429fec2809b6a0b31479110b64a11becb72f45c402b4db. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:23Z), 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/QZK6G2273595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ce1e516ad12e47a05a9cc54f7b1dfee08672f1d9810cf4f1d29f7962d0530. 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/QZK6G2273597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2fcf0dfeb4d8dacc7abeb4abf423c7e8aaf8916f046687b6302244642097bd. 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/QZK6G2273591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd44c3b1160948ee5f178e12cc5e5f199c4bad7bf2d9e7e2e141310fc61618d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZK6G2273592.