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 0x80ae5d6a0722d34dc82739f321822a980f357fbc746b0cba8b324accbc0d80b2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3ecf5d-75ce-4e6d-95b6-58f5358453f2.json and https://artists.proofprofile.net/proofs/artist/db3ecf5d-75ce-4e6d-95b6-58f5358453f2.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 0x9b0b9c97824cc0ca38c311b73c9dab76811fa8c1068a55ec84d6d5f0e326298b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:39Z), 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/QZL382257060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45739d0bf78d15676e34c7e7e98f990edeef3fc1d5580cbc2c4a21aab6b7dba. 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/QZNMU2276608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c43b27cfef0eb9266889d7bd29aaadf57652e42c85d44c8f8edcb8229136a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNN22340470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb0b49c4c9301696791f90010a9cd700a4f1f77f22fff2eab97063ef3230a92. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNN32304338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3403892e8cd53046254ea5a073cacbc7869b5f762da4c169765c4252e53e5092. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNMT2453416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4461c0acb8ffdd5f6b5c90aac5a50f9e9cf58e413e896bf9eb075a8e534369. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:23Z), 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/QZNMT2453419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e773b6a32afe8798f2152aec12bad163b02b3238455fdf402a1aa18534690ac. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:08Z), 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/QZNMZ2464056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eb7c3cd0c33029f0903b92d2d5d396e0bc6e4f386ed20cfb4287aea986f7fe. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZJG52558435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a932dd064091377d1a5501f00d4401bc0f5f4bdc9b3c93424d3524f23ffb7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEV2566891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5906b9d9e203a26e2b38be1fc5ed85aec8b40f600d0d50c0df3a7771b9a86c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEV2589748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caeda000459f29459344c2c597c0a3da463b82a684b04f5ecc07fa327d5d75a. 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/QZNB82569917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227e37b2e23084bd6c5b0ea016bf91c976842f5198609af08c8084e98d6b967. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNMT2580765.