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 0x2947d1e6d5ceb65cd9a823c7ad98f815156944c7bb4b67f6be89fb3f00748a1d. 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/b66eb5ae-7525-4637-a167-345169d2de15.json and https://artists.proofprofile.net/proofs/artist/b66eb5ae-7525-4637-a167-345169d2de15.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 0xa6fc0a005ed6a9ea5a7b39dc36bcaf2c2a2cab8b19f7daaf8b641c60c4320e82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGJ2368625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5505449151c9a490fabd2ee43823bc9539b4adbe72e9cf5a65bcfc6995d5cb. 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/USHM22127712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475a13ebd25a556a7a67ebd5d30fb1793778a70df48ce1be54bd9395d773fb40. 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/USDY42000452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b13639a9a26a0ca79449da9e055f52675e8d69ccfe1aa5b63ac0c4e4bfb9f2. 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/USCGJ2093732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4810ee8a1d813f583f4f4491a86d791ba7c5e69d9e5594afd4f34673ee0ee8c. 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/USHM81995706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98ac9a8696e1f3eba5099db0495e14ce1fe0bf513846e97d0ed169a6dea2514. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH1994630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0f6d0a0395461ce6409140af05f801c055bcb474b57a93f5ef3790b1806a1e. 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/USL4R1815115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e297f15ab48a754bfd174cc514d5c280745dba7ed257ca5c972d2623f35f5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM91809228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c05c062e6822f34682def640bec701a57e002e93eb5cf3d02d0d5c2bc240367. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDY41838644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a37b84a6bfd2a8d7d5ac7d3ff625a4299244a6cf714261fa2501fdac3b793. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADJ1701525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba196bc93833f4534216edd8a34924fb9a30ebf7e5418224be3a9f7bb5bab1. 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/TCADB1738896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13862c274bbc79310cd07b4336332b3f13356ddf9f31c85b493b788031a99fbf. 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/TCADN1817510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5573b9e282d5092376e957210c2276bf0aec9c2028d0f71d3908e0b5c1ef42. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADK1730689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8151bf5fb9a05da687b3bc95906f8a03cc9d07c905c8e3e89e1a87b736050fd2. 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/TCADG1719641.