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 0xb9fa0dc4412f2cd43acf1bac81c9d59b314529be54b136b9fe419d3481213cc9. 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/4ca23fc7-4048-4c44-8709-cfffd585c93e.json and https://artists.proofprofile.net/proofs/artist/4ca23fc7-4048-4c44-8709-cfffd585c93e.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 0x8644fa819abad3f7708ab0dc0369bf7516a9cd379304a5781c17e50c60223e27. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G2103831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e49147cd0f2e8b82ee62cbd444a2fd4a02cda1b7d343002295514f48961dbd. 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/ES71G2103832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcf128fb5f18f12599866351494859ce0c04f88138b0772c335667958cc4a5. 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/ES71G2103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d195a3a988cffac277cd6a68c7eaaa2f6f2c432bfcc20b6af0f5fdb3faed9f. 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/ES71G2103834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709c47451aab9412ee3ebe37da2daa02553098bb0a517c4d2a1e1e1865d14aa4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G2103835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b344582b6f225bcb775c87241da93d6fd2d07933233bab4e3ce47e8789a8e97. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:37:30Z), 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/ES71G2103837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebfe9809b9863bc1b9746e9ab94d359425f0f57c2f3e800be4521ba4724e69c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWR2115741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee7a6084a92c5bdf5c1a267740b82257de325a56026cb20ee204ec79a1d61d. 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/ES71G2212511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d025ba7e54b4b0e71dcac05290eee8c14ee558672b126a3ef70e3c5a04b8915. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ES71G2221667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c8834a662754f139ee530e8a5428f5a0dbccba71db2207bea8d7119fe33d4. 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/ES71G2318640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb474a8687b35236a5002158d034f0e1d89362b618c46d38a485554dd7037cba8. 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/ES71G2319745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63be3e96ddb5010d5b84d2866cde61c2d2bac4114c1dfb083bb64bd51d9fac6f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:41:57Z), 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/ES71G2319746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867924ea66e0e7e46bbdf0d304c6ef1791140009afdd254dc1a77d8501ea7601. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ES71G2319751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088aa6f8dceb325a1cc0c9f7dcd91c13cd65c95c778b5d57a12626c5e35f9775. 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/ES71G2319750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985012b1ca6748dae6ae5ccc566c399e91a81f64ce9c530ac62fb430bb73db76. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES71G2319760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47b1eadb15eeb7bdaa8fb84077578930327b7de6628de263bb9a924aab740e3. 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/ES71G2319753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acd6573724533ea1c420925eff9927d378bfa73b5a746f8db7704afe2ebe9d4. 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/ES71G2319755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16987501fb6cbe4668f9b2da68f8662ff42f378f5908dad885a90e5abe43b88d. 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/ES71G2319752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f887be24ec64851ab36ac6c6ad35996afaf3cf2e556ab199eb195886374582. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES71G2319759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598896ae84ad600f9addb1320c952e509ae2f130cb1fd2ccc0b5d527bee06ae1. 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/ES71G2319761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5598876d4037773473a1caa131325abc7f940e5ba3bdd7461c0e7c11b8c50daf. 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/QZES62518415.