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 0x5e41e4f8f3d752c052a1a37ebb60ddcf5e2a98daae3467fb73c64f92b804e67d. 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/f7f67c69-83ba-4e55-a41b-02a52b704e10.json and https://artists.proofprofile.net/proofs/artist/f7f67c69-83ba-4e55-a41b-02a52b704e10.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 0x5cbedcc5d957128dfab247134f96212c925ad81fdf849703af08c6c9db31aacd. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UK43Q1705041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6988464fbe5c4739fb65c900bec03130604ab95e145eafb10627d4de8f4c8c4e. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:36:13Z), 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/QMEZE1820573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096599d8f2349045d8073c0dedfdf9a7eb85718865f2bcd4399aee26c748e7ae. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:19:11Z), 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/QMEZE1820578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289113070e0734416cedb3d8e45d354a6e243990f837a1e4ab6b6e6095875935. 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/QMEZE1820579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99879f050e325870b913e543759afbfff2dbd085838094ba291dbfac8963528f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:24:44Z), 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/QMEZE1820580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671b7b0c70810237eae5ae727e02cfb811ab8876f0a08e25def77b939bfa8958. 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/QMEZE1820581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c836994e3beb85823423c67742ea441c68f314afc667da98f25ae3e65a7841. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMEZE1820587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bfc9d32adc1a6be3d65bcf178d00cddc7fe14ab89d8f281336005a076ea7ba. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMEZE2001687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88840c15b221a8d1aa15b0efb738a8e802afcf457b2bc2f36e0ed08110e128a3. 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/QMEZE2001688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc920115ede608b9a8139ce78f08e43754508aaee125b0cdc14d8875fa622bdb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMEZE2080604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6e2ffcc1ab5906bbf61490e4a7cf590ca80b274ca4912b5a4f9f5e753b2a61. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:59:49Z), 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/QMEZE2080611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4090943acab13fd5cf728a941b850cded87ef83922d8d4f915726b18b12f506b. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QMEZE2104357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0c597208db9884cf0496e05e7ad8cd19975b96c6011016d96baddd921847b7. 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/GX53U2018574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc8c3b8b42b739cc7b4b5aa3733b5c601922fe39427515b1be90fd8dc11a670. 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/GX53U2018571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19df7b49afae615e621f87e30a7fc94ef4acbf741be1efcf798941141670cd0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX53U2018567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c637ed5ced5bcab2e8e823c7ee5d478d09696ec7b1c54bf6946170bd5b50ecf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:06:56Z), 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/GX53U2018573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcda27f64ebe9d9a723249fd44c010de1c610020632bbeccb52b3409206b846. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWZ2333148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e31e756aac72796e0dde4587166015942a208227d1f527ac780e608ed28d5. 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/QZNWZ2333150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7ae4af56d6c46391c9bd00b5cfe175d2f19ccd937faaaefa96a1787ea15fd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:15:55Z), 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/QZNWZ2333151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735912a7404bd2b478db9e31db5057df656f1ee833eaa9af4cdb69acb8862fb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNWZ2333153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e8a46dd247f9fbb6855bef77fe767b4c5310cf45bdc8921df82b79f813afec. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:22Z), 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/QZNWZ2333155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c672eaa8eed4aee3069ba7c2a62550dce9485c7272aed7d1ad66ed35731f224. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWZ2333157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6415e5edd1fc2ce1bf5b41a018c7a7bc6cdcdb824a132c48a91b540eebf886. 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/QZNWZ2333160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43414907c4f10c754520f72c5f44efca61ffff294406b1d40674dbe6335f43b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWZ2333161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd6ca9c6bfb64ea48f4ee8e3dc3be43102abc9422cc8f18690511b4859aa2b1. 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/QZNWZ2333162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0443454303b1bee7313b6b1e2e99aebdb6857b8e80fb63e7d395e482d626cac. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWZ2333163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0ade4d8b3acfc16ebdba25c1933193fbe3083cac27ca2494f1959ceb41166. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB92437267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0caab7b7ce959513e18f42fddb50dac306cdd650243dfad5a6ebcfbb4663dd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ792532814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd25a5bcaf7f139cefe6fd57c8c48cd43f954663fb3294ab5f36273eba779e9. 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/QZZ792532815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb9814267f058e9fc09d63e3d8a89f7696d36e84af4eeae2bfab2c0d44432c. 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/QZZ7W2507433.