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 0x375ec1cc58656a2f2fcbc60ea1fced5492cfb8eff94181a48817d69645c3e966. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/424ce1ea-a1bd-4689-acfc-46b3f6e67190.json and https://artists.proofprofile.net/proofs/artist/424ce1ea-a1bd-4689-acfc-46b3f6e67190.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 0x6f33c17f9736fb37c4dfed6f560e3fee689d34ee409ba7b1d5fbc32a054aa8de. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BRL702000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8701cfb87354a734c68dac1fb117d77e1b6a5fbccb7584b699d61a92abd993ca. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:14:12Z), 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/BC0MF2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadd782bb0a9f3a9e72db4b28504df56c34f216e50975cae25dbdd15a191251c. 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/BC0MF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f444e5086e89df2d4c88c4319ef092a81bae1df4eb7f0618409af5938ea77fc. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:45Z), 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/BC0MF2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ced9271531253dfde6978fb7ae9720e9fb1767c5c4a84699bfbe5e414273f2e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BC0MF2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97cde0126a30204f5c3c8920b9096b73fd82ae7883e52cbe9785bb3b9c7c404. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRL702300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822942fd4e6d3dcf1bc3222ffa8ba0798896a9ff47887dcddc1f2c0c7f3d94f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BC0MF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9fcfaabc1e0086649372758517b4d4ae350bee1c8b00c972b104a279e66a57. 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/BRL702400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09d83f262e14f58348b211a1291d45d03410ac0f87dab8ec9c8f35036b8167. 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/BRL702400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd0a3fc7c61909ab0bb772df92bcea36c26a1fcc292fd734fbf60e3ac0909cd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRL702500001.