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 0x723768682215f6396d13efda0e6d2640152626ee4651d2c0b01c6bd446fa69c6. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/088c1840-c2bf-4001-bd3b-8d90ba9e076f.json and https://artists.proofprofile.net/proofs/artist/088c1840-c2bf-4001-bd3b-8d90ba9e076f.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 0x54ffb6d31c7a9f4fe81863527b08553d31282ecaa0959620ac201e20338b1535. 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/TCAFN2122947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52d88eb2bac53d0f7b50823499272f8ac64c05a8e8576e4f798d11c5086f6be. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:07:44Z), 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/TCAFN2122975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9fb9cff756e518e36001efe8fd121c6812f97754b11234f8b14a62fe2e82e3. 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/TCAFN2122984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f22d35185b6366e4a7d26b449f240f5f4e1059a6578a07628ff0c5a5fdd435. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFN2122669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d468ec6d1e02b3a30b9edceac05e58f62c38eff64d68fedd8a9a5142eeea3ea. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAFN2122692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da3663fb219535c3be1a186d0481ea003c96c197331776bb2ad13bf0395fcc1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:05Z), 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/TCAFN2122718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94115894118cb4647b6f4994522c0b61c271a4e85f74c8b66e17be8d157eaf7b. 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/TCAFN2122732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd013ab2e759d6d6f8f78181befad6acd0576d72e50ba56dcab6fd981e2f1f49b. 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/TCAFN2122777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa4ccb58db473f6959b6e2d457ebbe49588c0c975d02a7c2ed33cd6cf95ebe. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAFN2122794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d572f2a617e03a4b28166af5674201a41cda7ae17967a5c7d9fe9b2a66f5b1. 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/FR9OT2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be4526747c33ee53a406e5ea1d4b00b486fbf1ff2a49ab15beb1ccba23dc982. 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/FR9OT2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b35b1328478ff8b6b0f9601aa2bb8ee3d39c7d7792cb1fbbeb515d8420803cf. 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/FR9OT2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3799fc6a73c5196fd0778fe4fcb8fb527726679ca5bae1007237f17879ebb78. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR9OT2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d5632ae0bb52eec4b818e2a0447662778dd808d3a98e6186cfc7470078d1b2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9OT2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9380052a1795586e130a6a2cb40e20c330bd9b51703500065d36d8b469e043db. 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/FR9OT2300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c5165883d2aefb53a319e72ebab9f13698bb9d1a0ce8d0680082056a483b8. 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/FR9OT2300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7512dbfd4106f574f2a499142bc784ac2b98b3e43c01752155a02326b768c21. 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/FR9OT2300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ed3047219d417076e669777bc51366dee4032d2052b48e2d831e3484396c9c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:17Z), 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/FR9OT2300210.