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 0xe6cbd34bbd9050468a1901466dc5588d9b1670fd585f58cb016cee1a5f958e4a. 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/7d31c99d-46e5-4ae1-bb72-4928e7f8d658.json and https://artists.proofprofile.net/proofs/artist/7d31c99d-46e5-4ae1-bb72-4928e7f8d658.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 0xf337fa59d7ec37bb90c227c9738d2cb00b2b93344e3c05eb1469797219cc46cb. 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/QZMER2381651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd800f1fc596b4f62ba895c619e9dc8bfa16e67932336cfcf95b24913db70d5. 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/QZMER2381653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30590adb0026f6a6768f0044113b8c56b2ee407676aa9ee43e5f10da958ed8eb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMER2381654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7520894c5e98e6189ab7e57de0fda944b664acc9e687de6118cf43effe3bf681. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMER2381655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bebdc586c74810d16d47480e9b2de9a3ab6248019b7dfe6970df1c19449218. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTAS2351406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54b8cf50dc912b961c8859c397fcb25c5d9ef480ae70776fb6317367b89ba8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFH2428809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5728384e4d14d3382ad9979ac16dd94a1ebf41435c38208cc136288dd9c5946. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFH2428812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a4a0d6af08b892164e693ef2e50fac5640b1acc0fd4480cf1a28de4eeac56. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFH2428815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513bb328ff3417c9a31eae8ede7a9acdee92d2d60f8810c0e5d7789334446df2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFH2428816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082ca860889fe1e41d4b3e54ba60ede8bffd5b39ac22d433cad7bfe498a5f4ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFH2428817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce84fda032cdbcae65b49841d4a366c6c4079f39987000da14ed890e923d8c4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFH2428818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de8ee72ba268f8a64044d176b729622ea9da514f4b52d274d62eaecc6dc12d8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWFH2428811.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdb5d9f6e04e6c9fc35b429da270302e980917a52057e2292d1a80fd8f2370a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZWFH2428810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d50fca0272b00b8d71ec789439716ae2eae9c98a567f741645db4475940da. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZWFH2428813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a652a55c58c8095b2f2ac4fd02d54794a88a799071853b854f695a69446d7c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWFH2428814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f59bd5b715aab472424ae7cf806815361b638a3f90df2a811209fcde045a599. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0E2404690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ee1f324e427af445a74241cb1b274b45eff1896d13f43ed3850def1eb0322f. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZN882432118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851ae60499865e88da0d67b317dc05f29ca802021aecea041b8188095052a2d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882432122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67fd92e36318bd362b293ab6c5b308add243623fb9e79a25089446a245cca2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882432121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac6580618930bec1afbfd098433d5133d53a4179ab055a8cbfdd4c7829e1590. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6F2460200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642e2413d2919f310a149e4793d0366e6e8ab9354fe781e543b6db674d87acf6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFN2542015.