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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 0x7b3595010932f44a0242e6fbbc29e8d07793f25559410afb10f77022c6d87952. 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/af7fdaf0-7857-415f-b6f7-13f2dbb98aeb.json and https://artists.proofprofile.net/proofs/artist/af7fdaf0-7857-415f-b6f7-13f2dbb98aeb.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 0x3dc2dfb2bbd93853af8ff58da0071ffb336016f36226946680bd470a2e04e592. 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/TCAIX2420326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf53726755c273b32a5db2cb660e2d00216f0f0834cde3f76f2ff196264a32. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIX2420226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ee42c3e31eebf12440a061bd54026b342c58cb5e099b8ab9de0760fdff9e2b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAIX2420231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee642469ce44305c54e1d10112076d71d55f6517b61acb287fb48890c03d230. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIX2420237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d59f4c3aa09a77c180c5b2673b765757e86dc4fa1a1a894754ac66350d3b259. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIX2420243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfd017b889ab72adf3c4885dc63c0cff356727ae11cc88202f3413a819cec02. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIX2420253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50908adcd212e039bf3596b785a82cbdee41d0cfe7544408df0f6e1f84f25f32. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:52Z), 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/TCAIX2420381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc831a7a424c88fcf3f24fd3f7878efc47b8731b5348845be57bc3bb9ac33cbcd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:04Z), 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/TCAIX2420351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce36eff59b0913542717544d7d7bc454f07b1a9a8df6a43c17569f71e3da5b4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIZ2432311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e535822e6267c111353601e094029d089fb995ebae19718d8c77c2b3842a56. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAIZ2432446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab74fdc07d98e4c520f5c108ad222a69712ec32b68a3c805839a60e9e8f6ae. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIZ2432451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde28d5eb9b053f69fd69f6b936d7c4b5073fd82340fbaf2b53e756c47749171b. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:46Z), 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/TCAJA2432462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b46b633a71659067db180111d6e38c5883bae77d37c35400ec13a8663f204. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJA2432467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c44a871ef7b6638a5ae3707018a7707f2c2edf99e24e4359dc5fc0c3531479f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAIZ2432475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8ba7a837309d15c61af6ba3f2012eb81e17fa05a05b02ad44111231f7c4e2b. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:20:16Z), 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/TCAIZ2432479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dfe457a7b45f04626e8bd526154a4f17b082a51f283b5fca7430cdcd137bac. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:06:47Z), 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/TCAIZ2432483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc32ba0fceb5d07857655179647977bac8479d24773317e09d81399fc9942e1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:30Z), 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/TCAJA2432221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaf501f27160e816b9ebc13ed7a2383304048d567fb2e60c0fedfc3b86d4780. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:14Z), 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/TCAIZ2432339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db0872deecaac5420beaede987f343cd8c05eb5707c974766b2748b729d8087. 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/TCAIZ2466618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eaf335dcb32f528c2f38b784f1e5e8efb9b5d6213ece882851ef3c8c57efb1. 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/TCAIZ2466660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fefc4d57584448315800ea4a28115d07724b0a80afa8e05317a8440b2f35a5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIZ2466594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95382219e7917551d09f6cb3109756694e7d220ba4bb1d5f703d6eb5e3f5ad5f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJA2466113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c282adc282fba7c84b2a6234552207a1bcd2714f39a3a576cbf9b4578b11c4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIZ2466120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1bad9a82b5697831e5cc2101f81ccddf0a0990116445eaca4619a8c7f33869. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:29:34Z), 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/TCAIZ2466129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748f478b57663db32cd250fc58ae1d0e060b8eaf33db00b247c75f6c4bf09f7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAIZ2466136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbceb9580dc581114bddc79788979a9cf9c64e597f8b19eb709f72dc1f16d440. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCAIZ2466146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b7c75faa3bf47564fc0e46b1171b99f40860f3180c0e909ef7ca850abc5d0d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIZ2466154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aae958a9b1bee9e8e8ab0bd30ec0beb56fd336388937ebc7b70a32a45249de. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAIZ2466673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b8442a27ab978c3be10e08998a82a22fc890a55b223a150848e94e181bc37. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TCAIZ2466641.