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 0xcfa0d88668e662164f814fa87b05b9da456f06b8085d87031167102376cb01c6. 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/a4503815-3a33-42ed-a3bd-509f0c2feaf8.json and https://artists.proofprofile.net/proofs/artist/a4503815-3a33-42ed-a3bd-509f0c2feaf8.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 0xcb6336a74256405e68f73249ab9946fe462a069bfb6c6b89132c6b7b6a6cb456. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHJ2340325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85287960fb4200e25891b571a235832dd44a87616424e03a79ddda43f6b766e8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:49Z), 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/TCAHJ2340328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eca6d67d819699c1e0953b9f5d019e4aef2c6a5291fe54ff5bd4aff87699a64. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:50Z), 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/TCAHJ2340330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ef76616c99ebd42ccf816c814a7ce0be43ab5e851802db593e3a4ff8a2ba5e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:29:08Z), 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/TCAHJ2340335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1504076708f3c7d4f7eb3b3186158f62c43ee954944f1e4837a42fd48c941204. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:16Z), 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/TCAHJ2340341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb88d9fd20c8f02c3d9139183be24808e3c5137a0ae05d1bfed5e554bee8737. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:19Z), 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/TCAHJ2340585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111984bb37894467ce23b5f9f9d9408130bb175e4315573ef382722412cd7855. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/TCAHJ2340593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e68e8c5a1fdd2f396fe59b0cf6c80d5dbc21c819552a59913bc9a85098079bf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHJ2340596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3100ee41e2ca5f2a41fbe34a02960cfc4eea12cd1152125c1bcc00b4fb9c4be4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAHJ2340603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3ab230a044a17391db5f2c03c61cfea84025036847206aea88cb4bb691d2d0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHX2471765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ef959d97f06cb91d7df786f6012ecd60fbe005d8462d2cdca8dfac18bd377e. 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/TCAHX2471769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe459084d5bb6b8ea89964f1cae5ffcfa05483f0f9b583c7fbdb536ad7f07994. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAHX2471778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7aae1ec217daff6cc28c9a137d75f9165a318222b1263d318b5c60c12cef97. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:22Z), 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/TCAHX2471782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c308ad39508e0276a9fcb4696989a5f05b6357f75c9a3babbab5b7fb8fcf2ea. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAHX2471786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad021023f3a9a2c3e672880b64cc418e91eaeea112d4d9113aaf55e8f8b9a94. 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/TCAHX2471791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc0707b7e7dfe90510abc09b632c17fa70eab0ef160296f08a2a09cad56feb2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:59Z), 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/TCAHX2471794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9d6bb54c84e09982dc86f3787b5e860062542a14ad1ef45d73cad4d16207c4. 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/TCAHX2471803.