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 0x08239a9466bc875a5f5fbb21fbbcd69e4af9e2604e061804506d9c7528694480. 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/3243f6cb-3a8c-4322-a61a-fdd0f89919ce.json and https://artists.proofprofile.net/proofs/artist/3243f6cb-3a8c-4322-a61a-fdd0f89919ce.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 0x7f950b7148c4d641bbc3972d326372a7eabfa7bf084faf6c0b2e9f58fb9292a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJX2314546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7949323576d9be6fdaa27bde7ccc9b21fd04758ab4162f40ca024e7c97c57d4c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJZ2386161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e29bb9db7499f95e08d0f8824a0fdc0c063bfab8d0136007ae2e7295ed0f00. 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/QZDQH2421762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a64a706f9d930f8fab93bb1d291ed479a7571b601023983fea9a62abe8d9d3. 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/TCAIF2413096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dfda936eaf1bf7336b670f6accd2fedb23f297e81e8173ba6efc3bd09179e9. 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/TCAIF2413106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af565b41a014700b85499e40776b6f626bc85b445a6f92b30e10885987a97be. 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/TCAIG2413134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e4e64940a307cb80d9c9b47fe51e47e766fcd0b8b071cedf08af540f0c5fc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIF2413160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df339e7e16a8ee500a37122334215ef255c9307135301568cfe278d18555abd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIG2413181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f602736f8246806721019e1557b40f88fff20416159108d7968e98ababba7f1. 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/TCAIF2413196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060fa3fb31c19a5d151de25b0a097322326409d0ca0600f0ca62e19279fd6a9. 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/TCAIF2413244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bec81fb0be9228dc19ebcca0883d613d3e7f223ac7fa129249a5ac3f429e07d. 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/TCAIF2413257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f25b8826d1ba8bf729d904aac537b734f13e5718e8729ba3ee39543d70459b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92324150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1181ed86cc98bfbed8292ecba6a06f07bed90f7879a6e655d91e0dd271645f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92324151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f3524ba06b2a230a0c0c4466e484a1c2df24845a899ec983e81ff03bf21f7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMZ92324153.
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 0x47267995f73f425054aff8799c5065c3d251424dcef189d960df9d84d415ac0a. 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/QZMZ92324147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7659b855ed812b7356db43da1b92d60880e4af115698e1f6beaf6ffdc0cc5c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZMZ92324148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff0d084058211415ece38569cba606d438a4ec72eb1a3758a0e9cd81114bbe0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMZ92324149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce2dcd5d9df2be1656925084ef4df0408adda95c162fa6becb1cebb94de8ac5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZMZ92324152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f9a8c7ce887d5ba98d5fc7bb5b5e713108ad422c58af946cfb391366e0912f. 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/QZNJW2508996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc495f3980499343af9cd88fa95fe9454446036ccdcd6f7c19945fb4c0c80894d. 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/QZNJV2548856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d53bf7e527e9bf562613b44d3b67a9febb9a34f6201a69ae80e363483a01a57. 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/US7VG2574760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc17e4846f80ee50ba504c856bffa2412db7e4d369ad84cb2920b09c49623a24. 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/QZW9K2422626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e05916b2cba436cf1a31da65c85fd2a401845a6c9be6a176dcbbef76a894e. 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/QZGLS2413876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2431f0ade644456d9c48dd2d6300019336e739b5f9a84f9d0bff024ec869e37b. 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/QZW9K2354784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc9e615fba3c4963c5492791e3b5bd99aac2945480f88cc3f72c5d3a075ac6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2202583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebefcf3c5db51e78833ba7c748c45ec6e4812204d7195bcc638a08c0bcea5fc6. 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/USA2P2201575.