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 0x0666b82173048cd780353fd17e2ee139ed4dc08d957fb6e140a99077ffd90dbb. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0705b95f-616f-40b5-b882-3f6729773c8b.json and https://artists.proofprofile.net/proofs/artist/0705b95f-616f-40b5-b882-3f6729773c8b.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 0x0c3c0a3c5d2c0585a2587491bc62ac4132361c783b9cba900d9fd9e898b793b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWA539587501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72466516bb4eddd4ce7ea96bb7696cda8c340fcdf001dba7f73254e17a73759f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWA539568606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b26e3d3cb1247067188aef633e3e5317e2eaae7ec5c7bba0400d5bf399626b2. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TWA539568601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba914a601352abb023aa44735e65427ea04012d77156e2ff5f256ea84965a922. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWA539568603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3927563a55fec22a38a55839bc9bf734d406d1e3a3645a24b1f9b643c2351d5f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWA539568604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14238f9c6cad43541348fe4439c2112b1b9258be4096e84aa1069cef7505f88c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA539568605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72466516bb4eddd4ce7ea96bb7696cda8c340fcdf001dba7f73254e17a73759f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWA539568606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e208840825b3968e2eb3dc0108d3c3c076bbd4d34d2067a03799d41ab0146b3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWA539568607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb662fbee652bddcf6aa22ad2405f848779f1cd03ca2a122035e9fd1dd795d1c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA539568608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df5973b12104c471525535dab4ddb91aa4968aa0564efe3c456ba5f7709da0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA539568609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3686a6682d8547cfe9ea5cfd781ea49b69f31493a1d64127b932c2556bd7893. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA539568610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fa7904a6026b7281ea49cc0493eece413bf3346b7157faaecfac3af81f66b3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWA539587502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25387fd7d5ed26c03d5fc259bee3a67824b51adb27025e14f0fcce6972aee3d2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWA539587503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde56ae9e876b6cb4ae9ae00d7b6a242e77db6ed4c6f3f417652ba75d06bb51d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA539587504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99039abd1ca4c662654e36cf54d5d01b1f301e9a30a781a887e180a4b9e0f2e9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWA539587505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03779aba67474f895bbfaa43f594656078e20853d8bfc57d5724ae3cfd1bf9a. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/TWA539587506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5124ca157adc1737ecb1df9c2a46dfb285a37631910ff03baa88bd4456aa2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWA539587507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc3abd91a91f77df25bf8fea5b98746594506090a011c83bd82b4bc437a5095. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWA539587508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1045b695b7d61fafd4878614a201c28de4c7189aa22b5a911a7355a43cb40353. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA539587510.