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 0xa93d724481325524465df0658be17715a0c27636ec3a046033fa787abd1004e5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b878ccf4-5450-4e13-a33e-c00b5f3380be.json and https://artists.proofprofile.net/proofs/artist/b878ccf4-5450-4e13-a33e-c00b5f3380be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Navajo Healing Songs of the Native American Church (Volume 2)
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 0x35730f9ee4c8114dd3381d7cb014440dd7ed9ea05d3251768f9926433334bd7d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US8640533001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889574226a2dbfa6f688a7438b4ab20bbafe3729811d9285853d326fd5c45d6b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:53Z), 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/US8640533002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd586b83e253d73c777c109a82a30ed5783ab7131c221ab3e586cbd3a6e5ef1e5. 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/US8640533003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aff1bc3b745a597c46938d2f17da11411cd0314c322911471b27a1dd15ddec. 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/US8640533004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6744e2a9ccd907f7d603d2c0623bf9a746e2682c6581e44d44f7712a9b57117. 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/US8640533005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751903f2557bcdc4af3411c41118a458e0cc7c08114bf8c66a1e3dfaa93e0752. 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/US8640533006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde376db3ca81a82e680f60876ac9cc7727b74123a2fa6a02d308a0d1fde4e64f. 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/US8640533007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40530d5b8b57c66e7fc9f3349e3ef183946252d14c4db91e6b321c587ec13c6d. 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/US8640533008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec8690711025691c93842027c5341a31d733c6f73e2b852175be35f7bc1de3b. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/US8640533009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0673af7fa28abd093a6477becd7d91884649f569f598003e0e62cae7d54aa0dd. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/US8640533010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624dbfc8b6247739bc32d2df71b26823c15ad767db27b9d4c48ff53e0d18da6c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US8640533011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9b91b0dfa4ec6e59ce9aa8accd2e0a2d81928b1e0a89cb602e9a09f48bb924. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:10:53Z), 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/US8640533012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6811f37ddcb4692b537536ca1db0b9e19b4c3e950cf0116affc16b3f7593c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:08Z), 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/US8640533013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625c7b8769a8a1f3b609df13e87b658868590e170d48f07f6476fa36dddc951. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/US8640533014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d376fc266ed77a0d071ad0fa2fef5bee75852ac01bf9ed1cc6f3e161182af4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:25:03Z), 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/US8640533015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62987a8cfef4a04cf2eb43f9ff5d5086b67855127555404851c8dc69cef6d80. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US8640533016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5886c34325a0cdedd324879543c674b5c8d5ebd79879a5fc6a9521ff3c9ddd3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:26:36Z), 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/US8640533017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958b198ad2576eb668499426c3378ddf16443a9c2ef86f6a12f52f048ce6e99. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US8640533018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aad71100b301e44e7a00d3f47aa643323fa608d933311f071f6dc5296acde8. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/US8640533019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3cc6483c2c6f51ec2b883bba5039089dc18aac3a480c7931e31dba6280712f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US8640533020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb876bb129c94434bd630d43dcfa8824a1006907bcf4fcc371c8fb31e16c1b219. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:55:22Z), 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/US8640533021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9695992dc33495f381f102cbd1c726d38af4a59471ef8187ed299e94d58bd83b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US8640533022.