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 0x452458867c4f979c118b50a0392c14d63ddc059f985fc8011c0eb4d974cbf608. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e90bd4d-de8d-41e4-8aa3-758c503e787b.json and https://artists.proofprofile.net/proofs/artist/1e90bd4d-de8d-41e4-8aa3-758c503e787b.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 0x2ac1e45ada98c9d6b9c5fbf2706f3c959142799d666acbd919e4d8fd0f7e7511. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82449230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec6e88a6c267a8806a4f49b42405f8bc835eaf6ec009bce8888d9dbb843fe4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/DEPI82449232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e136b93bd19cf1639cb23098571a27f8b0a1b0fd5c8467070b80b92e2905e0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d709a440f05b411d8909b039b54a1cf3c80fd00977fb0943bfe751f39687a6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEPI82449234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ad53cd73b2803b7c18b5b50b0e219f7a43e79de6e35dfdb17f40e9a8af839. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEPI82448420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d9e30a488203f75e6ae833f018838e9069e8504961edb8cd71a9e9d38335af. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:39Z), 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/DEPI82448426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2e6660c2ba6d433fd0763bcc3f27303f4362fbf7dd8279db1d9b58e39e24a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82448424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a735cbef4d5dca801e3371e94f8a7c1a82f81467ee52243e438f2efb1e1497. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82449236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633a11abb518d7f5fd22ac078826fb3e50f5a7e3e41c08212dd2b53f13f3578a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEPI82449237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81866d13406980f3b4fe03212815f5b8889898b67afaa4141d39c1f7916ccb7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:32Z), 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/DEPI82448441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b2dd1694a1e4ab3f356ad54902049943e9415ed466937bc3f3bad9748bb563. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82448429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb174aba6a68d360e2ff9ffd023b49e6be2443f999dd117195476878d2ba95d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82449247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2170bf25297fc876e35fe1580c0970b42b8783f95f32f01c95c9dac448b8b50c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:55:31Z), 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/DEPI82449253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63292052ba6d9692ee4b49a0f71514e2dfb624f9925fa91cf8273ce577c186. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEPI82449259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6510a7cb8d9dd53634ee8ff016cfad0d55ae0c0c46f97fb191d122512e40f7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEPI82449258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05bde990ca94b199ee66423deb1bfd11d07512636ed5e10728c57c78fee5c59. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEPI82449256.