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 0xc8b53f28acfa54da9a27d7299e568162b6feb4c2f20a0b6ed7165fcd6dc23fcf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fe24eb2-7fbe-444f-a689-16e715f3d349.json and https://artists.proofprofile.net/proofs/artist/1fe24eb2-7fbe-444f-a689-16e715f3d349.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 0x0ddf3a1f69c77524ab93172f7380dbfc502837ea4509360f03d7fdaab86776f0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL1LE1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a28555d9d4d31b5ead6dc37b21e3cb03adf58e9b04d10ce91edd45ee2ddd16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL1LE1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af91e7b428112cd99a93af259e7798956fced1999f8ccb3caed77c015b6abb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NL1LE1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d06a87a61f0c40602b68fe5403d387430a62d658cd5e4c8ab955bbb6e704b7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL1LE1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b347b7345660afa3d786710f48c6d3edeb3fd27dfdb021820de59d0a031ee00. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NL1LE1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baa8c3b0886b5dcefbe7034a092f5e601df1facbaab6dc240b274d78222c9d3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL1LE2000584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bf254bb28086b9968218d041be23576be82368857af87b2eb8641bea0e16a2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL1LE2000585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b198cf45091e0634c6af8d191b650eda5979d645347dd25a1efd5d3c7823c1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL1LE2102381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a97cb7c1461e12df5bc080dc83c43d83eb9d8888d702e95c8d17e4e761fda4c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL1LE2102383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9294b1cddc03cde1d68cbe5da52c575a7ee09642f0436a68fa8913188c37f. 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/NL1LE2102385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab898dda64071964208023d9142ea9c3cc0d9e15508dadf848cdb4a990d5bb4. 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/NL1LE2102386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7117c41dd4f4bfe6c54c197148977a904b8036ff3f6e862e047fad75f86b27cf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL1LE2102387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7dd3311583778cdd74ee441d142eb0aa98db207d6cff1b2f2ee2047ba3c6b6. 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/NL1LE2102388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea66da9b8f8df60ffa0adf344c5f48d8bc3117dd3abe39619272a7e9f36fd9d4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NL1LE2102389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c57391d186a4e255881e8afae947bdc81125b6360fa06c6d9b9033dc85a682. 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/NL1LE2302902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ad4044e3213867960c3df676d6e9c567e1539220412040ca72387fbd06dfc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:41:46Z), 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/NL1LE2302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc653ab2d6dc7e6ce9158786327c13e07976e08138b2e1cb3a7592fd593f2845. 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/NL1LE2302909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7844ce4a56dd0985e6bbccd51c7c3f31db63a3a40a28d7410454efbd0accfc6a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:31:54Z), 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/NL1LE2302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011092fd97c72830a464c552c0202c36c1272f7b96517eac889f91ab10c946fc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NL1LE2302911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc2bcc563fb0d7857efd694ce466ffe7cee1e2afd0676cd2940ced7eb24047e. 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/NL1LE2000934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b79a554e6278b03551bd22956ae118893218c83dc1ef269f8b40e718a42300. 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/NL1LE2000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b79a554e6278b03551bd22956ae118893218c83dc1ef269f8b40e718a42300. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL1LE2000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad1cab74079900b82c92dc820536e011986d212aa8a189555d19213ad1b9326. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL1LE2102315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f7d3ca49325613db4b8f2a4b69aa0065dbc2004a0c6a328adcfae78346dbb4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1LE2001692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798d9cb19cb98d3155744f2b8192b74c6c52f57a52eb5d5337cbbe313ba4dafb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL1LE2000759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b79a554e6278b03551bd22956ae118893218c83dc1ef269f8b40e718a42300. 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/NL1LE2000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf3a1f69c77524ab93172f7380dbfc502837ea4509360f03d7fdaab86776f0. 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/NL1LE1900211.