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 0x51671cdffaea13467a404a1ed0b3baaaa0f7eadd4e42ff03630fc5e9c654b014. 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/b6f1ba25-0fc1-4c8b-a5ec-88efbd1ad91c.json and https://artists.proofprofile.net/proofs/artist/b6f1ba25-0fc1-4c8b-a5ec-88efbd1ad91c.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 0x191dfea9e67581d57b5a15ddbda1abff73852eb12243e4eecb13ff7e52dda221. 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/QZMER2025911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226c66da491aafbdbad5caaa822ee8543f36f0b322a35cfaedb796780dc57770. 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/QZMER2025912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b23de611f2670fd66bfd8dad5d57606f264fa9667284d81421299144e52cce. 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/QZMER2025913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e4c337a03e15468249c1a5759039259455561d32805176d401ad50fa010aef. 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/QZMER2025914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a81ec7440edd7571a1e406e921e7b774f6af1e9e294e93caa63960476694b29. 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/QZK6G2057794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda45aa577f56774f088000ef2f6d16f591eea2819939cfc3b51acaac96d16da. 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/QZK6G2057795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24c181312db410e58948caa0d8b9bff1b986ece9260d80a594f717be98d2357. 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/QZK6G2057796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a6db4b8245c5105bf51b62a60716cdff32e3bef89513422fc6406766882a0b. 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/QZK6M2089540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ec164d46bdda349ec92e2997da03daf7e6c4b1d76adeecce9a33c188c0591. 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/QZK6L2002044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe197a8603984e09cbb4171659edbe4af87592de1ea54a674641dad38d97da701. 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/QZK6M2089542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab373399e85f4a928723d1937f87a2e1d3170e091500af47e7a3c1054d74b162. 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/QZK6M2089543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2e84c51fdc9c75e5e9d784a10af4139391aa47ea98d49f7c1632a5e72b329. 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/QZK6M2089545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a7544d0e309f325ddf481e1a8cbd537e327111754a25a25835109b0b385dfd. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:34:30Z), 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/QZK6M2089544.
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 0x3f581cc00bd61da63d234f7e6f5093ad4e2f151e0a47d09cbd91637c09613272. 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/QZHN42004104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3068d12b5732ffe69bcae7277e9cbed7704d05e17ed4ba2e85b313360147a1. 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/QZHN32077688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3fd2f99f586a9a8722175cf90b0d726eb8932a2adc809cf1f512f212465b95. 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/QZHN42043953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc0ef59c2fa1fd106103964417e82595dee39c8bdf63191290d83a5923aefe8. 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/QZHN42043956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13eddd8659b53944a260d09f5fe2fa2ad9fb750151774949feea18a6c2a6db3. 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/QZHN42043960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91f2ea5ea244fdb92a015354d95e67f752f2345c2d329cf66dc6b8e3017c301. 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/QZHN32067752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684b0eb3f5ff626b809a053f98c5084f30b0e2497b5dd52459cea18989bace76. 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/QZDA42008357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ccd7561b9baf334bc85acabd9d2eb108627a36b4d04afc9d273414e711ac43. 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/QZFZ52009717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fff4a01caf80267e1ae62133fcd7a9234cf19b4f3cb28ea55dc29370e7cedc5. 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/QZFZ52009718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396af141cd7a19c98ab51f8456b6aa91f8fde7a8843cff406e176ff9292f7c01. 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/QZFZ52009720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa752c67e7e753177d95b13f3b7e923bf188a8353070fd205f30ba0a33a201c96. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFZ52009719.