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 0x5d340251e52cd489e0dac29aafb5578343ef50a8bdaeba5d4c654622bebed07f. 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/0de024c9-c7db-48af-a9b9-4408e1074596.json and https://artists.proofprofile.net/proofs/artist/0de024c9-c7db-48af-a9b9-4408e1074596.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 0xb450f24d7dc8d3c3a0a82ca207fd8651a17c628cb866718ea901bcdedc13113f. 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/QZHZ52246964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd47b42462bff530e09a61ff375db3f8bdcc3da1a7bce9a8c12ab242f63b58c. 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/QZNJY2291818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5e5733f979a5a434aadb122de0ba89eda66bca72f12c8a0e97fc0e7a47b9de. 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/QZNJZ2251276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe107b16e1c3d5117d0009a8d3bdcfc2e7385c8f7d75054897015abaf841e8. 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/QZW9K2341821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c9ecd6ad958c5d33e0c63d7bc29f1c51a560b7864d39b74800cfff010c587a. 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/QZW9M2320675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ac3578f652be9b73910260ea877ac0429a5d6f30ada2c7d63f91ba6cecc5ee. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMZ92483664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879fcba52bad587fc660d0f83ff9594e03709d5396593ecba01d3c0e36e2be98. 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/QZNJZ2405320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99796eeebb28b86c1d3236715b7a19d2617880244670e3777521c3ac77242b9. 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/QZTGW2403053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2af8f917474596fa6a3fb2b9ef6c122e296b74ca4c0628fd2eabd64d359a1b7. 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/QZA742524205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dc446ead85d8a72d8382f6d201a6f34cf84fe6c88c09def98dc32d9dfe2366. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZMZ92522727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0244fbf4d004dbf7b149c519fd8a2a36ad4ca0c5185572649d3edb2332dba3b2. 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/QZMZ92522728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42af365b26192d3da611be06b327bcf3072659aea527969c45c1433aebb27ca0. 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/QZMZ92522730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ac906209eab62fcf670618b3200350de68ff0346c916041072b4a7ed67e2f9. 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/QZMZ92522731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412b36384b8d4a23f608d8fe83493c97a8f6ea399e4f95a7b349c2f01371e7f. 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/QZMZ92522732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bd65afbc40f5e03874382f54c5f017ed328175ae1b58129b68722765687faf. 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/QZMZ92522733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe479eaea0b6c31756c6c3e32dae067f3a307216b76c20301daeb042758710278. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92522735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dd43291434c45ec7c6c672e6004250dd3937df56f69f949443be74459b6eaa. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMZ92522736.