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 0x5c3ab1f5bda7c72bf8bfd426e3d9efc0cfd4af8ad4a83688aabd32da67270729. 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/5b4e2f83-94e1-4d97-86d3-ba664c330986.json and https://artists.proofprofile.net/proofs/artist/5b4e2f83-94e1-4d97-86d3-ba664c330986.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 0x93812d3516ce35bcda5f10020e655d9418108b01223c7c204086e75445796764. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GBLV62008432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079cc77e421ccadb2af143c13dca3881ca5427f1e7163ff63a60e70a5360aa1f. 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/GBLV62008433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478bdf912e11d224e298ab654dc77fe6ed27f5da007195613a070f47708c6e74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLV62106629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7dcb4580cebde8603861f1576435fdc12978ba71ac776a556f11d213cd0237. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HUA1X2000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5b8134edec7626d927be490dacad6edfe8e3ea7bb4d679852a8d770ca7a91. 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/GBKQU2280129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7db429465bdf5099f145d089f1f3fc02c757f694177056fd8dfc6a25ae60933. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2284135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216107a1b78fa363a3c62d7e8a0191f03b5b3e77885c2744fe7cce28dd26bad3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GBLV62200851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd059a570abd6f866a4a38554fd834eb56708f62b3a019c06b61afe1a7c326e0e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKQU2333739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c8b663ddc7c10ef874f8bc7dce5e094b630c683b40fb0b599ae8184b9ae4fb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBKQU2372794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eebc0d0956fa38ee03e1f5101a490e91fd7c343db69728bb0db238ce49501b9. 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/CA5KR2485030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f997b5d2aebadbe2c4cec7fd9f4e5175d9359891916e2605ef2e28d827e03b8. 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/CA5KR2485690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0657b741c18b3664edeaa8f7ab2788e68a61a8e68affb67166f255ea8d2b3fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2496429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc04e2ad783a87197ae9f257364aab68dfe0b78dc057c860e3e0f86bd91bfcf. 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/CA5KR2508813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cdde6c963debb6d5b572b9192755dd4a702bcb0129af58e8a83b916e83a47a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CA5KR2509109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22be852908b3141669707a96684039c00f998a9e2c6bfda41672f990a05115fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2510618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d48fc6d33a1f279f8d946f83e8e650f8c50344c143e67bcacb3c9b944bbd0. 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/QZZEB2440131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b46418e07c7a0587bb50796054dc6d17ae22cca4aa641be5c4ffa7974bdfc8. 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/CA5KR2508317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e48da510e7e80161624e61cbf01756566703607252a95ec56a0b2a83f134f9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CA5KR2508306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbabe97d84b7296c621f9b800d38ebb461d67a21121a9ae48decb1d50948f63. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CA5KR2516349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca6a57228b72505860f0c56c097992c616cd56cbf7a175bc8466495c48d2aa0. 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/CA5KR2508231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43ea937ab394d284ea65c3d36705432225920658c772d7adbb95540b5518b5f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CA5KR2542550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e16a17cd2bd154b54d6b9b92d7a4eb46e45c8bc2f4a85a8fae4913c04d00c72. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CA5KR2546414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f739efd399a5d18f81173e5df5c2bc6dab3ba7466f0550f087ebfd7013558b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CA5KR2592644.