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 0x979943852499a65f9b291d8c43461fcb3931f164fb4bec8912f4619c038906c6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b92b1688-7810-41cc-99e6-412b134e9750.json and https://artists.proofprofile.net/proofs/artist/b92b1688-7810-41cc-99e6-412b134e9750.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 0x42c97d57796721cd9eed3dcfc91edae13ec284f4105f4e04ab24aaa0ca175b4d. 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/UKNMZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2a9411aef9286491f5649c61a3e2bb22f97fdd65cd8512d19cc4903b2fc8b3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKNMZ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f12c828633deb16409d544e2f6c310c32cbd42cd870187ce3027326ab5fc3. 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/QM6N22130913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee5fdcec9be8c5fbc09800341a2e7fcdab08c0b18a8de02e05c8c5cb96343fd. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM6N22126460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa307663cd174a395bf07d2d234f0b825df6be22618f6ae568f571e3d8b19b8. 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/QM6N22130944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e67d73f4f405559ac7d606775d85f26e23339896318c712d4cf34ddcc5b28. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:47Z), 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/QM6MZ2195796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2f417b49c00f803d6cee60e3c22436f20497c0c06140ad202895e625510013. 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/QM6N22130965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33322c4197fa35a6b85a9672e7a0522edb32468f380abc19ade9ef6b8a38b5bf. 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/QM6N22130970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51eea362fa1a67e608167a6ec4a78eb8e9377f6eecca0ee8fc9d42243671d17. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:48:46Z), 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/US28E2126703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5012ac6b0dffbd5d06894cc3c7a16be666a168dbe8ef0bb4c0a76d063de931da. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US28E2126704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8f668f7042c1c6ec222c3e6137ed150313fef1d12fc9eff33d694d1eb89d0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:19Z), 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/US28E2126705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994510933801abc2ab1d844c9e18321d0272f3dc73b4394fe42aa71b539ed409. 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/US28E2126708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d7a31c472b5ff7723ea052e5dd7823c96a9764b87241fd46ee49382ce0e092. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/US28E2126710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad69de8be3b190292167f178d32fc8c2bd8474ef28e34974a73691c404742d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US28E2230502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad5f2cfdaf13efa4fb2a96bcfb321783a5c28b3f8527a0cd9cb7327c31434c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US28E2230503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a771bb78fa3d8705e79ea454b8e385c726a174c8f0b3225f7502aa2ba2126b2. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/US28E2230504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23724599797d894ec24a1ca5f18bc30dacac008b564732e5142482c588bbaaa. 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/US28E2230509.