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 0x8725295503d15469000fd45b8232df20eadc51417c9fe929c9737b1201e6fda5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e23e4149-6880-45f8-aba3-a7add6ac1d47.json and https://artists.proofprofile.net/proofs/artist/e23e4149-6880-45f8-aba3-a7add6ac1d47.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 0x7d78dcf490f5e13b3bb50b5f3a35ea81574bf1f13a6cf2e74c6eb0ee2e4cf687. 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/US25L0800263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4003085238d91f41d7c666bf38ca652a1689c03da74644c9642cf3845b91513. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US25L0800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171d7bcd60d09bd879d09ae70b51d055e015e97759bb76143761d4c999fa051f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/US25L0800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf7e4fd6e975229861099bb4561f6a48518c50185d9c27361b7fadea375a692. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:58Z), 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/US25L0800276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d6e4999976419e31bdaa69cd78b0bfcfcc35eeea50a6b83a3e345c21328c8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:55Z), 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/US25L0800277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d78dcf490f5e13b3bb50b5f3a35ea81574bf1f13a6cf2e74c6eb0ee2e4cf687. 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/US25L0800263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ea2b216a5ca79579089c32f28702172ee25fc2e61eaf9e7ef3786a1e0fdebc. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/US25L0800265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a5ef312a77a2429f8a0d4b15267a03bebdaadf281df2a463652568a84779df. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US25L0800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4003085238d91f41d7c666bf38ca652a1689c03da74644c9642cf3845b91513. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/US25L0800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aa6374ee6b534d9f4d7f952e5491d01f375d0e9819c4a138efec0b57b24365. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/US25L0800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171d7bcd60d09bd879d09ae70b51d055e015e97759bb76143761d4c999fa051f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/US25L0800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf7e4fd6e975229861099bb4561f6a48518c50185d9c27361b7fadea375a692. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US25L0800276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d6e4999976419e31bdaa69cd78b0bfcfcc35eeea50a6b83a3e345c21328c8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US25L0800277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6478fb5738025e070e3bc19d8133d76c17c38d43a150b60e7ddaedf106dea035. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L0902705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c592cfe94ab287d3e1b8e3f73318807988b77cfe81d950914f7078dc191965a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US25L0902706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7024cc32b8a6c9b9acfe98414191ea8df5af810381af1c972e356e1257ae0e97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L0902708.