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 0x803023ba0a94257ead6703224c4c2262babc82e71171bccb1ab3c33577f5aa53. 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/f1598a49-db13-40cf-b86d-8e6ac2143282.json and https://artists.proofprofile.net/proofs/artist/f1598a49-db13-40cf-b86d-8e6ac2143282.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 0xf99631235c75e0e5c312e51452f94fd308bbf79406e574fa7edadf4e1b703343. 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/CAGOO2066628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa32a3ff1a5f3b21c82f7ed32719fd89ff7a191fca7216d56f94a487359e834b. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/CAHQJ2016918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833463b009ea1ae8b9ea2eb8f66b59db94f03206cbde553efc9ebebf963446d2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:52Z), 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/CAGOO2114886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16616a6dabab2a18fa0f2a1a7c9836e989b397ac433f2c56b4af4809132a25f5. 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/CAGOO2179528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e578fd8c5ddafe07ca8e54efbf8447defba5d8ffea1f22c7bc80542af449206. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAHQJ2177301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ef379f581365c54b222d73e5010f99577bcd54c8e23a794b12bcf1b68ca21. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAGOO2179570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3a2b697c4671556af8845a693bded18b2c5297642d9f3b33fb5847c21235b5. 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/CAHQJ2129895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2ace93866d8be2b1180ba2bed88e53b0ad9cd3ec8ba58aaabd8207fe361945. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CACWV2231863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bee29dc27fece92b1468462f9e04ffda4e0a15611cdb300f2d04180fd5f5c3. 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/CACWV2273777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf40c783f66b32b46fb99c1100fee906272d30420dc1f32c9800d5d8723ca3e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CACWV2399416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f29dd3707fa0c37f76bfeb380c053d3f2b152bb7cd48985745501d18791a656. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/CAHQJ2415601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e1d2113fb25c280892c8adfc5ad2d4babf4bed878ec3e80835cb8056cf298e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:36:19Z), 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/UAMB12435005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a99d6d487829c8b318a8d9aa8fcb6aa3e6a6ac194b133feca1d9dde33b8bd34. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:23:54Z), 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/UAMB12435016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e55fc03d71900c013fba94e22794ddb787875e34d60e31c8ab0a4478404a9b. 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/CBF8B2439262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08a33c5b6c38eb77131db4a335b0969e57c526aad8a6d35fb9b7a204e2a8c33. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CAHQJ2567481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59b38a52040926eb8bfa3f89a77e624acf6050a5bf9a33ed1e0d98503bc80c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:23:37Z), 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/CALVP2511368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf7a64af0c44d6c743fd854e692014f9f4769dada7c075b7a93c9d7ceccf882. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:10Z), 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/UAMB12535005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a07cf9a6699c1c2e8fbb37929042424d676251084ba84505f858af0be34206. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/UAMB12535006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaaa1db6fe775f5f8f0bfba52799dc5e508379b81733df4a47e5c5161cb94b5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UAMB12535002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1ccb26ae8b1abb3c3672367a19ec5d188e483a64b90c36fe0fc63ef3a9cf38. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/UAMB12535007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cd6a8a794015c71cd89f4cb66d48f0f5202b8baaf2d31b5b5d96cc774565b2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UAMB12535003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dcad629f73911047e21994391bb43c1e9a44cac8ea1f6be6c546ecf0016cbd. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/UAMB12535008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4920bf815388ce0703f5b7b0a8c3f552a4d4aee2601e5c193791665ec9580da2. 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/UAMB12535009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ff0d2fd603dc04f34d36d645d25550691f4024ac4b6c49d1c0b122c8386fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UAMB12535010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dbfa43544e86e70d4277bf4dc7f4bd54b0de1b817060b1648da524227e1046. 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/UAMB12535011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621467e5c7464d6fb5dfa778eae03e69f3724c74a714a400b02256f5ea01bb8. 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/UAMB12535012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b0c1a56525f15caf1ff1bb4afbd82315fe81ac5b70e5b4292d4789630ac23. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UAMB12535013.