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 0xf8d47f8885578ec314832937353a4002dac4055755d87464367d2ea33cc1eaac. 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/fa8e92d9-3029-44ce-8926-1d95134be94a.json and https://artists.proofprofile.net/proofs/artist/fa8e92d9-3029-44ce-8926-1d95134be94a.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 0xb72308858b74aff4300e5d0f0eb5821afa634e9f4dfc4eb0b203bd4bc357c9c4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMER2403205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188cf8201cd2dcb36d501f945413621ef0d73cebf8399ab7901a6ae699ae822e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:32:35Z), 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/QZTBA2324053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08716583d586386ccddbdbb39f6d4fe3087ee8e38f5ad2266def17813f1f8996. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTBA2324054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49ad70df4e7a747a5d4e1b067d8449d7cd4ef158d31460de5649151ac7e518. 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/QZWFH2311292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd72139fcb36d6ad43f681eeabe8ee964ece673c05fb2195ec192007b2bbd99. 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/QZWFJ2360294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c413dba4b6530b68fedfc7044d10c596381bcc1ae45dff57d5e2f094269b60e. 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/QZFYZ2485921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a161b1b920faa3fcfde52bacde74c3853d44ceecb16c57d87a75555dba8851b. 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/QZFZ22416330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51d891b9b66b6a3572b93b63f87f5961f1ca430e8c5b144865856faccb54d88. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES52448424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0323990120f39d5dbc48e105227bb78acb3cf200f11df0133f80ca5ca7e141. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZMER2429725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36830646c51a12edd7be7fe5d3b2cba277e2f9c46604f009fbfdf3172acd3a6. 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/QZNWS2418079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f4ef970d663f211bdcc8d426f8af54115f21db75c68d77011bdd9fb38cbf68. 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/QZNWT2462812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc900a298732708597d6905a46d53260e5b1d65cae83e19e22426e04ef23ba122. 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/QZPLS2418872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577ed8e22170ab0985e31fe7089c84289cd79dac4ab3117f0bd937d2f245ea0. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZWFE2464976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b12522b76c5f9b4b0cb7359f94348cc0d1454e9b430ad0b0f270c5efaaf337. 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/QZZ7R2483338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820cceb848733948f534c08552ae53eaf8df7826018e1a0764a806d2f47fa6f9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7W2470740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cd571dde2235e86265dd9856dc32f2a7b632ce6386d59d2c500e91e643aae4. 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/QT3F22418086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68658f8bc04b83e4cda9a61a46c38a0a550158be5bcecf2a2cdd89b8a5cec80e. 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/QT3F22433133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85be22588a6015bee388fea4385b04c5a2d68067ba89a6c9f5bbb54324a2759e. 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/QZDA62594545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673a15aaf139b0356c86554a5bc0860c09575874724edd6592aa510d6ca7471d. 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/QZK6G2518342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8010630d05772f8b8e811aa9838af0c57158079222d0cc1fe9d6a5dbc882a3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:23:28Z), 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/QZTBF2509898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46138a6cf2b85288f0a7c63d8bad2a68a236af14d9b246e2d771bf81136e263e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:41Z), 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/QZZ4J2502920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22b6c76cf1edca5537fdae67bf8512fc4b662f106efc559b00bb0e9c80363fb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS652487284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff48f6987b1aabee01741e5de93f9a78073c976be7cc580932ba520cf698dfbc. 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/QZWFM2422552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b95325c3f8538598647e89e35eb5a2611c9e28e37c0aa6d43f3fc6d626b986. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTAW2429558.
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