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 0x65bf251b8bebbc98dd371d5aebdeb897f148687b1f33ed9a61c1d01cabaa6dc5. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f18f17a-94c4-4c8a-82b8-35f89e1d4373.json and https://artists.proofprofile.net/proofs/artist/5f18f17a-94c4-4c8a-82b8-35f89e1d4373.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 0x21028ab1baea86a96f8f7a29124061faa86b3e4d6c130a83e75cdbe9dc7663d9. 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/QZWFX2457183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4952e2490067328c85ccd8f74a96e2e36436422b99a897132bf7ee83fb6d92. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFX2457184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037cf1aff55f42a0b81f0a79b217dfc0d17d859747e2a0c850eb479a7ad4b8ef. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:07Z), 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/QZWFX2457185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5df8850325ef6b63f535b8aaac55ea4633e029d70ec8ddcb32d748f7415b4f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFX2457186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca4ea2d1f458837052bb98ad8737265eed5712a858ad1213a383ec063527b4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:21Z), 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/QZWFX2457187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08cc0e7fa82772d98b1378fdd3c5b5ad73f0fa2e73805aed1b96d5dc6405204. 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/QZWFX2457188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63927454b5a333d4e56f95a218a701026a525932333abed11df6345c7e079923. 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/QZWFX2457189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406e229ba6042afc9734b60208370de5615ff9af0285e658555c37ee50e132c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFX2457190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7587af29cbcea3043624f5c1f6a01fe16e9a20519e7fabb87b4f5281faf18. 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/QZWFX2457191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc972907dfe6763e4c7a0c7ee9f7138269244294eae222e2fff9eba4703a12. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFX2457192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d97f3656d081277122f0e1bdf3788b91681b70b2d648d36b3560b769fa274bb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZK6J2592750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff0a6ecbdfb32baf428d238ddcb4174e1332317aa7d267cd298f2bde80906cc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6H2573977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0b7de2f1532b052862bc4c72cf8ee59596e4c81fa7f102fbbbc0c6f211ea9. 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/QZK6H2573978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dcbe2067c0fbea1c901f14865a424c1c33d196c0216d7ee358d958e9b5c2a0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:55Z), 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/QZK6H2573980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d066717054eb622dddbe63a3893434b55dd088a557188726cf076346cb1de2c. 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/QZMEM2539345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80601bd0ea04eea2dc267306866813ae5d0111391bb13e33bcaae7ec6b86e1c8. 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/QZMEM2539522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa276ac5bdcdaca728b07ed9b1cd07869b1d775caef0c1456ece1cd60ebdffd. 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/QZZ7L2503005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff6fc4dd881c1a7f15005b07c5ea02e6b1467d404e8ef4a09e3648f8f54231d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZZ7P2508463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccfb8c21c887e3fd2ba6eda105f6a8b9d91fba6882173d510ed8b27b4ca385a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7P2508464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905b0b5d94fa22c0b9db758e2048e51575314a261df917e39761cef9e9a6a832. 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/QZZ7P2508465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3802c37bebbf956d1d1f53ce5f09dab080fd82651440aa84120a5608de9c5b65. 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/QZZ7P2508466.