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 0xa5488e30a658e7e27acef4c63f9dd09c760bcfc084e42b3db4ff7c7644367baa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e26176d-15ed-4cc7-82c5-4a4bc21abb09.json and https://artists.proofprofile.net/proofs/artist/5e26176d-15ed-4cc7-82c5-4a4bc21abb09.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 0xeacfcb7ad5aadbdd0adf3ec4da081086a092694ab5b48b3febacf9695b8d583a. 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/PTFA10800812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684aa13260f7d7bd85a685b6f7a69938c3c53dac511bdfc8aecfdd4f6cbc47b. 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/PTFA10800813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62743b8cbb166c74a2ea50b6d92228162c081a0a41c3757f47f8dfe864a2d009. 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/PTFA10800811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603370356d9385468cdb147567728f9c149a4e38296862c7d0af2f52cdcf3497. 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/PTFA10800830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6efa40a941cf5996f50fb7fe44310d487077a637e684a8ba36ab289fa41deb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTFA10800833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeed96cedcde1575a75eadf6e233ec2cc6d9c351d8f3ee4134484cddf3e2251f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTFA10800829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11bc96b6cc88676cc33b9d5301e43c1c273486447214ae816011643f0f5cf8. 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/PTFA10800827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a3a680e6a89271500c95cb8223f77f5398d4b5e36d9fe6c7fa4982c87370f. 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/PTFA10800787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009570dfd3450c5fff2bad6102819cab01d5ff86a54c7511c7d00863ca61ffd3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PTFA10800828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c77dad0527775ba7034d5c91294c8ee3aee73ddc352cd79682721ea725e7d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/PTFA10800837.
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 0xb8ea19a7bac1b3cad1813b1e0a38c811c9628ba752f3372b92b739d3739ad757. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PTFA10800838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7b0b0eb927db0b0fff1cddfb81913908d5e1fd8f69ead3b160111a9b773e8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PTFA10800839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55f343ae5a3a3ee64c643d775280fcfc4b25c55cec2c24f902f54c6925d5e62. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PTFA10800834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbed21c69f34edfa5c41cbd5a83273a77016c910f987c1a0c3b550fa47e47fcd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:28:14Z), 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/PTFA11101637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb5504051a6eee07709f72b4575a7e150fd89e66f69434f716794487b37d9d3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:03Z), 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/PTFA11101643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4c503e1f2717b6f9190d573c90ea1df8eaefc3120219c964ed0879a3335fb. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:22:39Z), 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/PTFA11101640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7442bfdd0b28a1bc3f84d62871cc5a6c5068a2b1e67c1b0309e100b3c352007. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:38:00Z), 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/PTFA11101648.