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 0xa65be62f8cb03026a99ee31c261571912daab50a17a0f561d4c6ba93eec1ab30. 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/870d2177-9cc3-42cf-a33c-e4735ed319ed.json and https://artists.proofprofile.net/proofs/artist/870d2177-9cc3-42cf-a33c-e4735ed319ed.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 0xaab8825529e9db77a15875ced4c296f14bbd4850b7c696328fe9200c727ab5d5. 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/QZHN62165520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f818865cb34bac759f127c53ba725d70400cc1020dfcdbdaa5856816c2535e. 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/QZMEM2118213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30746bc441b56f6343813badc1a545b60df2ef7b48533a78ad368200a080982. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMEM2118214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36315a0bca510c73ca9ff2852abe6c851c9e380605acdfc156ffc5adaff56ff. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:00:49Z), 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/QZMEM2118216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf917875cc17efdfba851fc439bcd6e77d9e515a263ccf911eba537bea68d92b7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZMER2102543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006ae2491df4419d00c564554a88591f3499ce35dd2be0a0ad1d091b3b082a3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTAW2224033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f39c8ecc3a3bba6dc0f294b920947655aa32a7e4d9e5afbc1524180de29892. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ42395080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11dcfd739671d2151eb510ead8e43e2dc9077e62887341a3fb04547a7d016c. 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/QZHN82373418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e9e3806a0b78ea24a716cf755fd3342214ac08addfe11fbc65ace06fda4b9f. 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/QZMER2392525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16db4b9a9f97baf022e4de44e7eb14203a9f836c4ad5a68390175a04748e2a70. 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/QZTAW2423919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac815ade825e87cb33db03f55022648e71aab1e4b85e39e5006707c0d96fe8. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTAW2423923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd18328a11410f184cbaedb4423977846ea40ef31e30daf83e28f6021d9f5f. 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/QZTBB2424941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3c38e0f3cc67c475f85efc4797f4f7c753dd92064c010d29ba81f95e53292c. 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/QZFZ32552695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0354f4d0e63505f0bb11450469408ba30bb0654b824a4e34ce5cfa55ceb7ff. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:23Z), 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/QZES72542810.