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 0xcb0dc1ee4fa1e8760a3f1ecdd9bb1e6afc179e9eaa225510ba2c9dff624d97b7. 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/87d79ab8-afc3-42f6-a3d9-2eaccafae65a.json and https://artists.proofprofile.net/proofs/artist/87d79ab8-afc3-42f6-a3d9-2eaccafae65a.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 0x26a2aaa4e0551fdb2c1952ae59ec4b50644350bccc97c6d13f3532bc20f0f819. 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/GBLFP2372706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25c164a68623028296029c55dce23140bf6921fc99a4aa5482d629f9fa329b8. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBLFP2372707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c19c1b3c0ddb4095d0048c343a60497d89cc391b3f938f8e54bf400cf26dd. 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/GBLFP2372708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cee84abc3bb46b30af8136bede59d4d5ddecf3ed248427a277defdfb623e23. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:13Z), 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/GBLFP2372709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fd343222d16b2f237c56fbaa4f30da9c0f84531b0d63070cbdf1529f82aff8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:49Z), 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/GBLFP2372710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b217b22f5f887f52a73f83867a246e7304eaddd5bb01f4263896722fb5748ef. 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/GX3Q92321582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc174b3cf58a0d6e09b2d9a2891b38318e1fbecc246ed8497f794fe0c6127c84. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2372711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77e4107c59fa6e49ff2116a4ab439d3b31f7dd597afe6856dc548facbf08715. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP2372712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58bdb5ec6bdffcea612963db6636a9952f981915a62c5011da9133f3c59ec00. 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/GBLFP2372713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e6747b61d0db31de79f0ad2b442e715c2d1f4df19297468f56a8d98c81a673. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBLFP2372714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e0de500fefe860dcf0e0f84fe9a4ab5b7b5ad4a31cc0e374efad9b3d17b610. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBLFP2372715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da2b5544b3d05114191aa3918b5a3441db3d7b1e6d3aed3a505d42ec93f1b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP2372716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd69230656d1c4fb39c17410b612e6a5cb5c6cccb656b5e4d14056bab49b3e1. 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/GBLFP2372717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dbb9a2d7dbb8c990006f57c1ce5bd8073e8bc1c7cbc9aeecd41b69c3a3ec62. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GXF9Q2402360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eef42f5a7701dc45af3565c141ecafe7a9b389db84b7043d46ebe01b34ff0c. 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/GXF9Q2411456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cee1a6cafa1efb72fdf3ec297a2d1e1dc0cd5dd9422998bc2beed2f41dc21c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GXF9Q2535209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd3b14e5e63d6800a5a097a6274de30c1ca48705e529515a4335e387f57099. 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/TCAJL2555757.