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 0x2820c646c4d8cf43ed899cea7929f78545e529d7c524dbe37d938930fb530bb7. 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/073d05e2-f8a6-4c31-9023-0040418f4b2b.json and https://artists.proofprofile.net/proofs/artist/073d05e2-f8a6-4c31-9023-0040418f4b2b.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 0x87eee50187d4818f73b08646e12cf5e89b76f446c86935ede63fadfbcb57f576. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:59:14Z), 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/QZNWT2253062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf214d5b09b6511a7c33225c09eb79c78dcce917904053d3278a3b25289140a07. 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/QZNWT2253063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ecb11737850d864565677986d8b513c916163d14469c54548f023535d03a38. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWT2253064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f52ae31719fb9be8d884fd28ec554659cbc34f2bff31545393433f3c2bc266. 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/QZNWT2253061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff763cbf3572bfa8a2a0a240a127eb78ca3665dca6ebc1165b590c617a8a78. 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/QMDJH2350611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92736be9448c3b46b4d7f6e848face44dfbea796014c7b237ca18391634b137d. 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/QZK6P2388771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66f53f74e4440eccd275b6453c85708c29450cec7637bd0bd01e9853a8a5d32. 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/QZK6P2391836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5e659edfd0c28b2f550138369bf77f1c370dbb708d182b51784ff336531d80. 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/QZK6G2328519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c1b769d45d136191b76f51d3e83992550355980115c86004b07d3ba8785bf. 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/QZWFJ2382792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc702c360bb111e200de688609f3cd98c4d12fbb52602d1dfa04fa2c51eefd4ff. 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/QZWFN2312015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125e6af285456c87389de69d87988d9e9c7d5a6ffbafcc0c8679a3544e6f0a2c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFS2331498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a28eb5e416d9aa63c97fbe791e90fe8a47c6fe5f6cd6548c487e7d25865db98. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:36:19Z), 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/QZHN62410307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a6b1cb985d3ef120545d31f15a7801685b420c2898642947f153af60f9672e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNB2404123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda5b9bf8795edbdaf0279bd164c81981691604dccba919fba9e0585499c29c. 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/QZMEM2427110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a28eaf37b0a4f655ea3093f1c09ae5f135aa3519f6448b06270df12c95230fc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWT2477658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1388fbbcda4f7d7213b8485fd9534b813f1730804a2ea5121ea1d1a0ca533. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZNWY2428155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75071152f1b51ae440476d0e3d2ba35b5089a912149b982021473a99139149be. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:59Z), 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/QZTAY2447826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbc60543ebe4c919177e8642bb77feba62ed865bc044dfddb987d38dc7ca01c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAY2446268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a884e8dd034e7b4b2b3fb46cef18a22705fcf3c191ceb8adb39d07a71e0e73. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFE2472151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c71df102ab4f5b72c982d024eee6e4aee61875aa4272b95405df065d1aa54aa. 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/QZWFQ2410403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54461282ca5f0184ae96e3bd5592d6f0595aceb5490cce13c86c081bcfcbe78. 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/QZWFV2446487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78f00d37a471b296f343137ccd0d6d2fdbf49ca232b458253b6c6efc49ca969. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:33:23Z), 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/QZZ7K2496790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c45e8e16d4f353efd3864024f1e36a09ca0115d0037394e41505718194bba3. 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/QZFZ32568872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ddeaad24e77c79e5d91df704b1cd6f322bdc68aac13bcdb3aff51db65e863e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:01Z), 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/QZFZ32568873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12a8321dd7388222c55ba7ec46658a3203648001a98a52ca6c42747958d786. 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/QZWFR2528977.