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 0x709fefb3f292f2b474bae28d688eae9b51874d66da30f43b4c91cfe59e2d0db6. 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/dcb0ec98-e668-45ae-b408-d12bb031c085.json and https://artists.proofprofile.net/proofs/artist/dcb0ec98-e668-45ae-b408-d12bb031c085.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 0x68d77ed01e64765d7a8873cb97eaa83384afb9507a57f5ab84f1105e38c0855f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZMER2463609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c7870eec38001b97d80294d0f6f3ce37835fe4db4840719e14c63fd2f578b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMER2463610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57c420738a9c8cd464764de5d0a4e8786448e8a40d640107c80098ecc7f5878. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMER2463611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57e72f57312bf1f69a4937ab7aa5f164dae8c40b1dd2d4346c6b385c80676a5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:57:35Z), 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/QZMEP2425914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189e4806cf9cb71637e8be50febc90dbacf10c1b13293d2e407a3eb19c0f13d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZMER2463612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ebc966069ba2f3c5b20b9c5acfcfd57f4147d1541fa1fefdcad63d2ec08e79. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:53Z), 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/QZMER2463613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4053907c54af9a0ddd54404c3d2737479df912172cee589d36a423889b3b011c. 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/QZMER2463614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba679ef87b08d2de112d8a49259dc980225023202da2cf2567d4742ca135130f. 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/QZMER2463616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d43c2c2d1cd4c6ff8b1a84e5ad5555ca29ba5b11bdeb0b9d3adcaa9c249658c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:13Z), 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/QZZ7M2492685.