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 0x1f4d457085063f962a5bb30331ca15c1b678a8d2020485f0c1c7482882c5d3c6. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/211fd7aa-09ed-45ae-99df-4d4e48a63acd.json and https://artists.proofprofile.net/proofs/artist/211fd7aa-09ed-45ae-99df-4d4e48a63acd.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 0x122ebdaed09d3dfe47796dc82f235c65b7a2cee25f3a13f3164e451864b163d0. 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/QZ6BJ1803701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b7f1f51724717468e4bb28e901e83000e57a1085fad943fa7f966fd5a0a8b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM9AA1641958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ef7b5f251a961eba57e134e95176cc794ee4a1b62138502d227c49ecbb44e. 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/QZ6BJ1803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c797533fc4e0c6019d67e26a33e9bb95c7db80c0c4f6cc75565f56a3d970d0e. 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/USHM21370953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb07a9ef2229db8d025eb95fc24a69522b5fe98417ae8ebab158ff74a89a9374. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6BJ1801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c429288685a934ee3e427beeebb531b259d1765d75e1cc2c9c34c702da59c80. 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/QZ6BJ1700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bae0411c4d40568aa78d763ea9c255dd00a152e41a83c2ea63824839b801c3. 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/QZ6BJ1803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9fd6b35cc72afe3fa3aa38195a4b6814bb6e2ebc4021838af72d9490e64a5c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ6BJ1800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a166531f9791d06f1fef357c92645d3a104a8b5177549995fcba3432f07f199. 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/QZ6BJ1803704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ac08e2664fa0ab6d1e39a041eb6db910d996e0f24adfc4a3dfab74f2856e8e. 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/QZ6BJ2006304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417301bb3e8a1019230df2a8e09f1187cbf3d76f09c1a1a09791145163d20430. 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/QZ6BJ1902501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e34dde99f5857e93b44289a1d9692eec3b5159ff638b4f6683af4430ce37bc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZ6BJ1902503.
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 0x2319e162c849437b2a59d3acd4704c8523a791382e4ce3aa09f47c4f668da543. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZ6BJ1902505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d88856f093c656f3d05874468ee33fa75c81e462c63ce6460d359aa9552d9b2. 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/QZ6BJ1901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb7fb4fb2897040afcbd5befe5e2cbf4a41cb999dbd778a5c2bc9e9f655239a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZ6BJ1901007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6dbd248c070b0be2a4f4b93d2c656824883bc548ffcd12efcd909908a7d170. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZ6BJ1803302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a6204ad2ab910f22e7e12bed3d17688916ebfc0462f60b57a5cca83c3e94ec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ6BJ1803309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae349514a87bac6dee0fe26df139c33bb18459ba3d2d8c2d1a1a1e9823a9ad6c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZ6BJ1803304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507efb3c628db657fa7601eaabf3774c36b1eae1bb812b6ef9e9ad3b3d2cd40. 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/QZ6BJ1803308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c24b23cc73be932e58a1c6d3d5a4f2414a82c88e4892066eff5a1936a034e06. 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/QM9AA1641961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc578cf65ca252d480295a3ddf40c7ae78773e212c9e96992b799eba47c856. 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/QM9AA1641964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c373a4079e564d90dde3bfa832b3db7a9193bb61ede8bfd2edaa9ac7c5f9f2f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM9AA1641962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f700d4fed0dbe2dfe7caec436c90fead7a07e74539646eb598efea745eea86. 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/QZ6BJ2104008.
Music From the Heart: Emotional & Relaxing Ambient