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 0x0e42445d0deb4951773921c28e0d351d7f6068de42a5a1fbdc0960038a97d8e6. 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/742b60e2-02c4-42ef-b056-3203bce00504.json and https://artists.proofprofile.net/proofs/artist/742b60e2-02c4-42ef-b056-3203bce00504.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 0xb2c49233109e01d9f2ad5b718ab7a2e6cb2ffe86c2c9374a559ad89b4827255a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFE2056579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb281429863756d681f6db2187b3c53a22d24f537abbd85a19186fcf3d459ddf1. 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/TCAFE2056616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900b0d68da95539f44605088a53ae15db2b24fcb26b4edee3a17ccab3a9f40ab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFE2056626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7fa9b824cd61f6961cda23a2f06e533b11d0eaf8ba45ecea2d535f10cd95be. 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/TCAFE2056631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b1c85bd49cd685db0ddf8ee8389d800c0ab2eed44a2b6790b920f9b51428e3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAFE2056652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eff998ae5f81b2b9ca40c302c8e255b56047e126eabe4853b48eaf9f8e0d955. 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/TCAFE2056660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec8a050eebe3a078d34ce631d97cbc0797ee2d0d200afb87f88c2cfee520480. 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/TCAFE2056677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3475a6ac212b7538bf57d92de4b8dc5e290966a12f7b9fba679434c6f9bc29d. 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/TCAFE2056680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bff9d01c4afb84a61f8e8a6fe82c402e3df0a8585999a2dbe8cef44f91d695. 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/TCAFE2056683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5396a881b204a6ab080eaf1689422fd7f33d08991385e388cd20767d6e19db90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USMRE0804601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3734f6a2be5ff6d65481ea2bf0a3c1c28b013b207ad191a9b7061dce6a4f389. 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/USMRE0804602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa7efca0548c334aae52b4c1f33361292dd4cf12af646e774470a5b34258d2. 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/USMRE0804603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c42a52e8bba63f55a2b45714280f52216256ea5e307bd20a6ec726239da2cc. 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/USMRE0804604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32365f17e2452f4f036a840f311fb803697b600fd9f27fa9fe2b882fdb416ea. 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/USMRE0804605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22260335f1809944ffc58e668d494e45142eedc18ec900f5942b382a2261dbb3. 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/USMRE0804606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38d34619209230aaea1d8bdfc1940c1924554f5a28eba3ac46960c7c1a1e639. 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/USMRE0804607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05644a44a8443d5bca0341eec3dab6855d7d0a78bbc12e042780e4f54560ecae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USMRE0804608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ac96df08747138a7513c7603d23f54fc24a986131ad07266572ec7f78f4810. 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/USMRE0804609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c68c729c83876fefcb6cfe1b708280eed05314875395df366255a1d821fb9. 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/USMRE0804610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ecce95caf4f2f9f82557c88d00af74c07adddca2122ff41316f61048706f4c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7YG1500292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a7ba952de590a5226810097809fc677ee2d1cd470dcff101efcf7026957401. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7YG1500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9d2aa9544f4a09c04528b89361f49c9ba3dfee2c79f0bdcde7324dd670b302. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US7YG1500293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3cd94114a3e27d6e352e449bfff989449703010a027f6cc21c6e4a6a1c7e48. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7YG1500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680dd98a947eb6ec2b43c62976ef8a7e770d005339d475ceddee587d6e2fc9c. 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/US7YG1500297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a09697551e5d38536a23882d30d07bd626d694bf93b650f31a5c33081f7857d. 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/US7YG1500298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5501dce5b194cfe525728791a55e03be8a1a378350656ffc2efdfa3f3bab89. 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/US7YG1500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0401fc6e3509ed83912e3ef8ad31ecc540798fa3b677628b66ddd8dac288ccc2. 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/TCAHP2307588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53dad20eb6b795f062561824e085f98fb5623ef3274dc55d025cc3d7de2374d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGC2215396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb3293f3ac3f8ce25c6f46eb996ff51f9f3c8736f9bbc1684ab155f561c761e. 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/TCAFJ2154798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa392c22ded12ab9a68612fec9f2783f5a5dfba9c48a6c658603e00978ed57. 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/US3Z42000734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dfaec72d1f81fd64a3b2d279ee1f3b56e31ad7df2b6af1a69f5fd8b863fa2f. 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/TCADR1893966.