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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb95b65ff1ed488ce8a55389c2f27d243a4ce850fffcd57be1c9e0d36f2ec9de. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47643892-7122-4f38-969c-1b85e91649fc.json and https://artists.proofprofile.net/proofs/artist/47643892-7122-4f38-969c-1b85e91649fc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ded9ae14b2231ca0ff4be4402ab0a75513141e3455571bc718c5a891a72de. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SGB502269666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4634af1bd76ea19a49cd2540295f0f1c98d7a412452d8f7b01451f2f36863. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SGB502235486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd089d07e8099f2ef503998afe92f1f3c927708e38b65e1bf8bb647a0706d95e5. 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/SGB502235485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dad46cdf2755e988815253655048589759b0e62f70f9ec75531c807da2d054. 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/SGB502304399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09842de92a1d2e13a4a9a0b53a76b2cea2414d4818edda8d1700a488f7b3186e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SGB502215227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cc47d99df1c7a48215a92b8a3ab7254a452ef60f33a9d024efdd481f8379f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SGB502215280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358e24888f1454d3a40d6f64bbd06152ac281072e3ae7cd107ae141bd9a0151f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SGB502215233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd057f6e07d952432b84324243f16fcd7a674eb299656d836f16e6db4e6f55e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SGB502215795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7177f4abe6265164421551d5091cd1c78c70accdd98a32829988c3bb0d0bad90. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SGB502271234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e04ba264bb83271433b8027088623d8290251e989b18fe0b54bb2c2985fb95. 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/QZAY41902483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935c4245c540cdcf84ab8296009daba1db7151b3dce5bae5459f738c648eb9fb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SGB502302205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5bf0e4d76a18b97889b16b1151ed3430a5c8eb9e3a255425f7946d5fef9167. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SGB502323497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6502a726bf8659434514d0d1af66fb76df224515baef339921d066497e97520e. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/SGB502323636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5edbbc8710d35abb48475d0a544ad1a52bd7f3fef85e32ce57f04f702d8271d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IDA602300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8fe4c24a4839c87cd5b688ef0cb370df9361fca2ca4cdcd6d347acdcf7db2c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SGB502377473.