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 0x116f995fecc32db239da7c612fc16e72c27e0fff9e8cc3e9b50a344784384e93. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e2c3220-1724-426e-9a02-4022d4694f7c.json and https://artists.proofprofile.net/proofs/artist/9e2c3220-1724-426e-9a02-4022d4694f7c.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 0xce3041f7139b08a4f36f7db71860b60aaeacc4908937b55c57d11090cb1c7d16. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:21:00Z), 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/QZTBB2539968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a35115645e127ed506c977d34a16fce527fb2903b9889866b16147711a0cee. 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/QZTBB2539954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc22286398d1db9a430a7d3ae4662c5a4a624908e3553094468c2c01dee3e7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTBB2541061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce57555ebe63f2a3c6f6ba60fba538c4aade694b4e805ca60dd794f402d7eed. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:25Z), 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/QZTBB2539967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22c8ef5f8a4d2569cd41a47b218160f60aa9453f27845c1ef99b23e93ee81d1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:42Z), 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/QZTBB2539970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ba47b2cdac981425914532061ed0ba6fe5e84becc87ea871546fe618eb50d. 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/QZTBB2539972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76930322b93d4dd2dc94a63a45b7c03ce7541d6b972d8fdc0b55a7bc8f179a38. 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/QZTBB2541062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a720e3a4987941a386f0d460d9a3a87e95146b8aa398e6f96283b7c5f433397. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBB2539966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb109a73a42ddbee9b619148cabae657b207640220bcb0753195e750a99e2f014. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:44:08Z), 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/QZTBB2539974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2508857e80ac1f11b2fadec5417d04075837ea5af5210e2062d49d8e45c5f442. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBB2539953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f12c2f4dc7b72e59576979c830bf8ff939f851bd343ef2ffbe645feca5b4e. 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/QZWFG2504451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4edfb0cdbbdc88bb6e17afd4711527c64b9001439628beb8698065701783b9. 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/QZWFG2532254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b5f409e307103b70112ae9a22642f26ec13e0073f909d7fe9fb6349a76d48b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:00Z), 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/QZWFF2560881.