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 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 0x347899fa4974d68a5deb51b5524bd6e2dc00159c11a9f845e002a69d34c6961d. 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/e21c859c-ac58-43e0-ac91-e172472b273f.json and https://artists.proofprofile.net/proofs/artist/e21c859c-ac58-43e0-ac91-e172472b273f.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 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 0x3ef1a065e3eed48b4b63be2b64b8b8db2c697413ecd3a928dbb2a428b6d4f82c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/KRE732300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6435f78533d713cb38d6411a758abf799ce63fe237c07c6b677e3a72914a81f2. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/KRE732300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6032d152692288f45d550a99697f432fe4dc044e13d084d0e16a9974d1d76378. 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/KRE732300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6efb564a447c6ff44bccadf923f78e4c424500886587ea67fc6e0743b39b0b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRE732300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee49df9deb7fcdae2cc00ec0c5ff2ca4f332371c360a351e75a676ab9fd93ff3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRE732200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1017f9edb431914c2ab4c96aa9bd3d41e07e46d03b79b3ac13e69e2ee01c950d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KRE732200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774f9d0559e32a3b16fa6a95be405c3bff9a7b40912ad6d6b2f0ecd804a676f6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRE732200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fa2c4902038fa1b3644067df93c3dfbb16bc7ae349ebab4e7c3d9259dec254. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRE732300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b7e7fa8cd176dd2106f09949bbe9000c78a57b99f59c1487dfcf540bc9056b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRE732300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d50983276ffdf29f3af433192417120586ffbdf841373271ddf982bd01fae5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRE732300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b8c1462bc7ef8d31c89f8ab01415061f97dba6733da5f87061597f51b400b4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/KRE732400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c389d6927c927c04ff048dfd4dbf5bb295ead0cb32bcd23acdb7f0f2ae4257. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/KRE732400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ef33d15e87bbe0ec9abe2d5934b2107b14bf6aee277605a87fc924a222216. 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/KRE732300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8144d0cd415a5e92ffc4311a92a39da45da55a0604780d250e7f93f28349d403. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRE732400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968c1b190f113f105c67404c69467e66f2f1668efc5e5a60025c0c846b0fefb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRF632407587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16701fce4c2d40bd1b43262e9bcaaec58eee8cf25c0a128e5adb1c590ffbba56. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRF632500336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd228881c7f7579d8cb3c321b3e292b77822e4ed363bf0f471c30f6075743a14. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRF632502591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c24a6a294135d2c8e4a0a24d6239ef9dc8a2a49a4f852aa0053c4e65d70646. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/KRF632503462.