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 0x6ace90658d3ea377a0c6130aa86a22606dee89abfa9929899c7174f6b3c6f306. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ca3498c-a2c1-4ef4-872b-3bf65a5b21d7.json and https://artists.proofprofile.net/proofs/artist/4ca3498c-a2c1-4ef4-872b-3bf65a5b21d7.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 0xbbc9a9e748f57ca5a91bcf97e563143556ff5c3457678d28cfb8316a40d66c75. 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/QZMZ92471786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792249278729471998425b575aac88e746174c1e05208b441519a5fc01adc752. 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/GX3Q92368084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16271e3d70c35abcc53040ac377a64175f518180ca43f9f244317d07d41cc3f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72317185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dcb58e80f4090c386b8ff731d080b3ed13e31b0105fe255f397cfa905afd02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2237881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2b9a81208111795dbbc4bc74c01e6ece79ae1b8966295a35d4637df3b4b62e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2212387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e0eb8ee6f333650f04a37a90fc848540c445a395b0af03a0cc6ed2444dd7d0. 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/QZNJX2237882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac3a4a325d13703ddad66f37ad885c6d4bad51418b1ae9bad605543c71aa35. 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/QZNJX2237883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0fb6578365490f7afc66798e7cfef11ef4c8a72d3e953ae91555698525c09e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ62204081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2bfa303d679230f28ea3f99b2c530c060a646395a2d69203b8c704a36fc5f6. 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/QZNJX2237884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d33815ce8dc977f94712cd22d6572947938a91021cfa4764d90367479ff34. 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/QZNJX2237885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67140beeb6386061fdce2bfd05ce69337067fc4f123cf2e63460120ef708786. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJX2237886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80751b7c3cff38920de63c7525b7e531fc189aadc8978958d7b5a2aec905d13b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJX2237887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2329a4a15963404f4a8cbd8635370373fd6f4578c076f6e7a477c4c1454e638e. 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/QZGLM2250186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aa1b6fe348e809d8887de38556543332d04ef50cedfcf61e98839849be6e94. 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/QZNJX2237889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26a839cc08624aba5f1284624c41e0a8c7c2ea4501d79a6d99b1efcba8e1378. 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/ES47E2003684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10806d3ab08bcbdbd59b32cd00b92a9ae84aa4fbaeed597e650d9bc4fc056878. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES47E2001469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cba4f0e53975f786c0ec405a64542d2780f26e135d1bfce7743e96c52791e30. 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/QZHN71924820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfbfa5b963f7c2bf766e96fad205c54f69876dc4abdf2b79d9b54753d5f144c. 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/ES75E2305900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89274b03243ce43ca7d21d1c81207bccde3b6defeac39ee3a6bf8e437d39f233. 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/ES75E2504192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ca99b86649aae57811d2c511c03582be5ab5285010a5cd0242c9b5c3521920. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES75E2500494.