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 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 0x483bbd39f9d23f758e51ae17cc22279d1cc40f1ca5bc3d20b7fe71e3a8e71f12. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0216dfb-ab72-4cfc-bb17-0c9f6e5d9067.json and https://artists.proofprofile.net/proofs/artist/b0216dfb-ab72-4cfc-bb17-0c9f6e5d9067.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 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 0xdf7ff2747c1834ca8246c06b09a389bcecbea3542f7232899e1a47b48e8902ed. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEAR41713302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa2911e02cda88ba8833ce4b1eb32cb1d2d051c6b2168799fcdd6626045dd65. 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/UST8K1838913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff9ff2ce33d5c95031af04d6c2215f53f5b13e8f992c5ac3ca2d7b7971ca02. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN31943875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9699508f2c6dd0be2d69b1b9b94de0c03694608760c17b4323b4654174ea8247. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEYI51900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fea465f2ba13ff33cde2c3fed6ce81df40487c6e3f66d1a8be878e146a4c20. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZFZ62049657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daff681848f11f4221fed58cc467e9e764c2dd79f4d01cf74f9ae422f368549. 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/DEYI51900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5c22de1792d04188dc35b79f9b7e19c5bd1ab6dcd5be1e9692ce07d91f74be. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZDA52159590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645f174d37fa15246ae198ce48c14634b883991975938e438f5918af7922666. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZDA62132199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace84618a59fb9d78c5b327e8ea312feea03ae28802c5266d340ad640d848873. 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/QZK6K2138778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b1984e88cd61d9070f6b75577f45e6dcf8025042e4c428e65262ac8344762. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6K2138781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fee267d5895609ace4d30a96aed3ab61d77d107ce0a670c25dca684f7ce25b6. 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/QM6P42210482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eae1d9bbd64d8b9192506913ea3524afe04c946820aca39abb81fd3507bf76. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QM6P42210483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b08c9e6894ccaffc0bb87903b023dd148b7e1478f9e4cffbd886d69d911cb81. 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/QM6P42210485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bf4c4a90458eb3b88a8d102bd9a78f66426074eb29c09b8e69d57ea3c2b3a5. 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/QM6P42210489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d928800af2ceab7a71407e61eda8bf3cd5548308b3a1d17a05004e34dd7ad11. 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/QZK6J2388413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7add3ccef9fcacdf7c60bcc6b2d8be81055821050b6c6825a00980cda8a2c478. 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/QZDA42405437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae518ddca34a16a7b867012b242786d78b2afce1fc3979dcf85487207350895. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFU2466903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a1abe84f3282fd2bb86faeda5f9e45949967005b867c096d2dac886b50a33a. 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/QZES82591002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39772b4131f0deaaadae02b8233c72639d465c2169c476ccf03284d101948838. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNC2512936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e21f084603255318ff87aae86e0a75ee7699a094486a11b53148465fe42f90. 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/QZHNC2512937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae518ddca34a16a7b867012b242786d78b2afce1fc3979dcf85487207350895. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZWFU2466903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e606d6c874691fb156299a56923c09626d56419a11d637daa544338b5fcf82. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHNC2512938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084ac3059ff8e37b5cd9450c9768ea89d10f1e261341c8924e68c2f3331cbd20. 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/QZHNC2512939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25122c835d42309b50c546fd4f50e89266e2b37b0b20261c6f144d0506fe60ee. 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/QZHNC2512940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a1abe84f3282fd2bb86faeda5f9e45949967005b867c096d2dac886b50a33a. 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/QZES82591002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed6e0081c02e4c9fbdb12f13df4840d1f7d90be980ec1c98cb56c6379972996. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7811924362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0ce3ce5c01dca5a97d2ef9e0ae53fc0102a9c522f4ee2585a1cb9452cd55f9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DELJ81769668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574eed7b71f6156995b294de8e46b8ed616469f54f6b20725db7f31eb370316f. 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/DELJ81739158.