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 0x57e753c41fcab3c40c298659498f892c11d62ad18420644c0254f27aa839ea4f. 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/76f08a28-1d79-444a-ab4e-9440ff2e7e25.json and https://artists.proofprofile.net/proofs/artist/76f08a28-1d79-444a-ab4e-9440ff2e7e25.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 0x80b13d544957ffa322c403a8b0c56bbd329a1c003f6d03a43bd1d5c53b6f1ad3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEP2062914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1e8a7a6eb1540e5828be01e91577648a275114487983bf206d60c40e3e74f0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEP2064170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265fd28887b0209babdd23270db8c78c962ca5899781d7151f4ce228bdb04341. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEP2064185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b640a812a51fc9a2db4a02396bdcfa9d587bd406a7f81a504a05e2817733245. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ22154770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c63618c1e9496615dfcd70f4113eb4759a02b0559b1fb926af76ecf1dfa35b6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEN2093717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9b5166dcdaeb1f83bcc5153af2ad8aa12c2757690f1d6d2cca7d68d8a561d8. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMEP2047050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9951297fdbf2adf28acea212222496f5c38a3388a7fe28cfc9b63b37dc4cd442. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEP2050859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf086aad5cf8e74885e8f74b4f0a7c350480d82a3143098dbc3542713f51ba326. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEP2051908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8bcd464834999c7e40dda30fad7f5b4e0f0a881b2659c9b0c4289ad1c2f934. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEP2051910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4267a5caccf5894ff16f3c44b6be2b25cb61525a399101e7a9986b10c3e5e83. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEP2051913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23182800f93eea84148ec877eacd5f794dd67a5a2bd56be365a86fe286f881f2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMEP2051919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43835ee56bfc9e6adc9a42e5de2aefcf2ba7160a7663d76b558a771adcf34662. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEP2052823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb818b57b38d5fc8a5a08dfd1f63255a730c063c27e3967065c9becbf0370759c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEP2052824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0dd2576322fadc6992b9278a8008cc5cdb42e2705b52234bc4827a9efe681e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEP2052836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bade2af5f4b676402aba36805c1cb03a0d50b9e1d20a7ddca409395bfcca15. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZFZ22158839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ffa9515112ae7097b441dac8ee78466f01f882d0578abdb35966bf0e3b8e2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ22156635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661f9bc9a57dd73e44fc6be32b5b56395a6900b2e996dea1dcf498683a00f35. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ22156641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c9632a47fdc0fbeb1ec8990102bb7e4b5912a3739e61066d231689981902fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ22156665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b54e3adc8145aca7ba8b835ed4e32876aa89fc7029401f3223022db556af73. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ32146034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b8bb3c566839c5e6e3b2e85fb69dfc7135a4847235d088d97a1f0d6053731. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ32146037.