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 0xc5e9b6dc79e100f86ae2811ab143d5d078fb3627d8921e0ef39d1d989379cdec. 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/fd4b4f52-2288-4b5d-8dcd-2698b7bdc1ae.json and https://artists.proofprofile.net/proofs/artist/fd4b4f52-2288-4b5d-8dcd-2698b7bdc1ae.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 0xc5f25478e6c0241159d24a1428776a6908eefd7336702cada61d1f5fba0825b8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/RUA1D2371814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb58e21e6388eaaa9ad284e0d9dded562942b431fd179c7da56f894035ae4085. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/RUA1D2377791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f495fe49fb091b20ce00174b070762754f38de1d40ebe5c78a540de94efdfdf. 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/DKFJ42100491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffa468c70197ff41af35313d5e6caa357b28953dd9d427d3fe79d80571bd243. 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/NOEPO2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005af7e2c845e99dc96cc34b021f01fdc119e3c36ed219452923bd24ccd7c287. 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/NOEPO2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbe41f977c9e40df0ce3ff3be67d3543929afa0b4e303a0fddb3c01b10b137d. 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/NOEPO2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11111f864f8182cee6757c96fc262cd0019beb5a76c9c17cec13e9f3e71699b. 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/NOEPO2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d9b6d5f0e1aee0eccdab927863fa23e16291e6f8c03f3557d8988351159549. 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/NOEPO2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf1f985d60ae5803d3298de26e361cdae097cf694e744986da06f16f9e765fe. 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/NOEPO1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542706bc1b6ec42020e0b841f4dc9c017dbf9ec4f862631de317135c5e09bd93. 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/TCAEK1925075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14cc0a2681239d6ab7187d20d95eb0ead44f7f66a54ff1825e87bdc5641a5a4. 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/NOEPO1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c017fb73e7f8ef3f99bee8ddd7b183d9c982e5e3a8d2c69e8226c6d02ece27c. 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/DKFJ41900354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7e6fa86851d32d0cf73db3190f179fd1e93fc6920182dc75ce40756f4d9180. 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/NOEPO1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e2b2d21191ca9e5a14003acc62ef15b00e83a5f051d4821675487348c496a. 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/NOEPO1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dbe43cee6d15d0d29bb68761423c897242b10e2ef63bcc1a76cae043e56d6f. 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/NOEPO1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f34c8915a6b4603dc32b11ca612b725aceda260d7fb04592854be50bd23a7. 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/NOEPO1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928fec0cb082eecdfe45d5ff1098bcabb3dcfb6f06d554038ea9a42d783fe88. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/RUAGT2329892.