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 0xc590743674c07e6823a9da5a823188063e696f9c58b72fc25e665560d422c6f5. 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/7b1fc4aa-0785-41ed-8944-c7ccc0a2ec46.json and https://artists.proofprofile.net/proofs/artist/7b1fc4aa-0785-41ed-8944-c7ccc0a2ec46.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 0x48efe91a05ab204fce1c60c6dfbcd20e5795bcb3c03bdbd32fc8ce424a4c531c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USA2P1800442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21662c76112a47392221e5f13463b1a7ba85c976536c64ddba4b285af6eaee05. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA2P1800441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1292d1304858f88e1e709cc4f7d2bb462b6ed10f36dcec0ec1f34b583e144135. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:36Z), 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/USA2P1800439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc8c84a9dcd6d8cdb8203a1e844a4a1703aa0f9f9c9f77bb88461f548d3cd6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2P1800438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4980bf983a068fc8fc597f117ea76852d70cc6a96c3c068d7c76ac40a0510064. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:20Z), 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/USA2P1828474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d329f93164ff2be8f3f905ac0945fa9c00ddb7e5c425f7252bb31ea9fd0ba3. 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/USA2P1947512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cc37903cc637f011209d5fb6476619af3c6cde4a86e2645eda0ab10fdbf5b5. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:46:10Z), 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/USA2P1947522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0922f07529ae8ee7e3cddcc940e7a4b4fceffa9f37ac966edea1070a4c3cfe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P1947521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869b6387b81aa1b93972382e50101d833eaba4a5c59540766470f8415b096bed. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2P1947520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7d6e7ccfecf274d4030f47e3b96e795d41e20c366728556dfa997b18d03bf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P1947519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2edc4d964fccf799b6810b4862445c86cb5a76bfbb4aeeab141868341ad12. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USA2P1947518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a15ee8f6517a87e3e5f9a186ac74de74de6fcb13357e6a2aa61e9c62e5e3ea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA2P1947516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22802edb498143a07043ac4095c918acdfabf174962c85ab4b5b8798a51dca44. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMCE71303380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c751766bae92e478650cc34aeb6acc97bb5bc80405c332d357fd43b5f19930. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMCE71303382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3aa195305fcb30620078e4381bf63433010351dfa4def80036651c45a7031. 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/QMCE71303383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4352269d6c8f10639eca6ef4857668aa4a76e315f9302319eef5b849d1820a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMCE71303385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec82cd811cde19f45e9d2e0e8dc21e0ad01630426b88ca3ab4f2731f6c2253f3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMCE71303386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e968b5adc739f3b1bed97337399702b1948a5eaf6d6f0c3c61763034b1e3e1. 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/QMCE71303387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851577750f7fbd1a0e94200c4a6366831e68a0a995796e23b16cc0e5a3483193. 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/QMCE71303388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3044849aa8075b866c0adc3dbdd9324d67d75aa29e8143ae1187b27c2bec3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:27Z), 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/QZTA32202413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b34bd72cde2e9987c9949296773a7e3743b51b7485454eea8a67a232d5c1c3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:00Z), 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/QZTA32404101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262a8bea72525d36933ae3af0b5c3b3a6317da0c94bb638196f8b402992d0cf. 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/QZTA32404102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c463bb7e303c4f2b408cfc3da8a70c5ed8a0b331ad037963bc504e51981bc8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:29Z), 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/QZTA32404105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2560295dcfea1e82d77d2f2b62aa81c915891b3a15a6f48571dc1fa9f627d31. 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/QZTA32404106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f65e22f4b2582f9be6453c1101746c24a48b95ab09a906ff9aa7b8604a563ea. 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/QZTA32404107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898ccf0fe3005ff43b04c3ff6449f83270b4bd665c1b23cc8b88fb84188e642a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTA32404108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe492c11ebd19724f059f4fcad1e16abeb5493c13895a843499acc1be7e8ae7c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:43:56Z), 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/QZTA32404109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081cf0bc1934ff14c080d614c39c0dd657abacd911a1576f94758062451c64a8. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZTA32404110.