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 0x7bfa9de3c0880bf5c1dfda88128d4c5b2898b56b05a00cfccdaa146a2038556c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e91e4532-b3ec-4ef8-bfae-d76c30a3e244.json and https://artists.proofprofile.net/proofs/artist/e91e4532-b3ec-4ef8-bfae-d76c30a3e244.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 0x0994336e18ed1d3260fcc12ce0ee9239ab23f95f4c43ba9efa2e8b4d93749a62. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:23Z), 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/CA5KR2477329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eef91192f7117b429dc4a3a28466cb7c03ae061152e4fd14903ec8e25fc6dad. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CA5KR2477331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceaa31a2db069f7fe2d65efed808275a330bd07a52c65b24a17f2a37ed463ec. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR2490761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc313664852b47ec0e423d3907785ebaa7ede29c340b8e6000bd25810bc5dbb. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:01:03Z), 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/CA5KR2490762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c7a2c7af85640ecad2d22b3722db26c93ea487b0acb45cc272954bd707dea4. 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/USANG2449540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8209c345b5a87d66035979ce5977df4dff9e59f02bc6ca1a5fee5ea25f79be2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USANG2463327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9a1c56f32ec91276b634a1985d3e13f4257baa230d8517ee80c22b5cd95705. 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/USANG2461652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db396a8cfca580ee005a12c512370e88637337bd66e9fa8fb23d980edec732c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/CA5KR2499182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f863d2bc21b527463ab9a4c25c3acd93e1f79196e838507c6f751921d23b6cf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:59Z), 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/CA5KR2499183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21169d8c03967d954bb18e1c493b4813d907ee935ca05bb8882193929a958907. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USANG2479166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3c4cb03f3c517935ad46158ec527a3d7b80b52e71ce6d7315a2f552baa0318. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/CA5KR2504321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f892ca8b0f189ef469fdfc0df877ffe8e90c4ebdef562b207f6226f9115236e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:40:08Z), 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/QM3DF2409185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a90d4a56b042849d46aff452b71ce6aee18651a25e711e642d2393ce6a8b35. 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/QM3DF2409186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353ea0e41e5649aa0ea1d3c6aa5cd91cd98cb1ac5c74a2c71fa4b2cbb4d6532. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM3DF2409187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad8cc5003e862f1d021d528d4b440ce4518f1d8b318fe58db9772d0f67a83df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM3DF2409188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d77c13e8019f895465b5bf1b1a6bd4fc33ec8132c213ba005315463bcf1de3. 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/US3DF2516461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc7780a57ab99eeb3765e6e45575bc713c9b6a3d71e96c464a4bd5f25f13a03. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF2532998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5e9cd6b7b31c42b115f59d27530686bea6a907f35aeacdd9005eca0f1406d4. 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/QM6P42544020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01ec80aca37c9a0a4787c03c6f69c9094fc4680a4d7c440ea89d532b7d0d856. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/US3DF2566594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8007768c8d6371da1227a3f595633e8938ba47926128dd10c08e621dfa9d6698. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/US3DF2598794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55eab78abe2e8fb30a58ce50e771de48f8c312645dbd4150d6a1cd96ba66a40. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US3DF2598795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8339ecc11f465c2595b9cca0723f514e8f1363c275c5227316bbaf07b9ede68. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:06Z), 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/USUYG1747387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7011b8947f81d60b42940656f118a0320c20a5d421cb478ce0b3b7a44d98df0e. 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/QM4TX2453731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe868c42ed29fd259220d5d3eae4a0c2014f60ef46919c629537959c1444fa5d. 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/QM4TX2453732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf0eec8375afc8e1738dbbeec83a8e8a7661f7ff2db7b316cfca6cf3ac65081. 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/QM4TX2453733.