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 0x67c7bf405054dc3556bdf9ced6b4498aa4d18a9bf8c3702b9ce1e1bea3fb3211. 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/64914107-515d-49b9-9dcf-52c9d89d264e.json and https://artists.proofprofile.net/proofs/artist/64914107-515d-49b9-9dcf-52c9d89d264e.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 0x9cc4b10e6a46d1ebef5ff7289a4e65925a0b0b770df55baeefd909d002fb1fdc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAEK1933814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7294ab73c56fd584c312575dcaa3bb20f179b46d3b52ff4f800a81678f62f880. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX201915247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6cddef6c0761fce0a7f9ca629176eca6d71f70b55b8003890ec1e1cc20a13. 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/CH6541787188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e406f72bbdc15dd204bdd88a23b23d1fdd02277c01603a697ebc5a36b09aed9. 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/GBMA21874180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8810a88fae352a8fa30020bdba8db7572407a934fdc6185c18dd651c930631. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GBMA22043832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79d9c8802ba2af6952cdf567920d829870bdef0961b6c565f715a3a3bce9f68. 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/FR96X2082902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250272ebdcbae52182e9f3ea39040e88ca00ea5746cd33407bd6ab5cb7a1aac4. 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/FRX282031515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227660d67f2dd1d18ced7435fca787ed838cc0226de6d207757902bf788ff21c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMEZE1792771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7dc5d36036b6cc73789fa039ee2a99c587c1f79a50d0d6f03feb8ed074ede5. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/IND712010285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041274edc32767879977ef363163601a87002b5855acabf7bdc7b07eeb911c64. 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/IND692000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddf3db9c1698d308a880d3436ab42a0493dcc398c45470eb6b0ebb9aadd9841. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/UKJ8H2203264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203fd1a98ada0aa703f083b13ece76057bc3490d8e306e27d2af6cb59312d33. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/INU252205238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2ae89750c7d77474dfb84cbfbb2b2b7edae014aae7d7f0488cc99189c3bd1d. 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/QM6P42370688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ac90749f8752fccc4323ccd4f6c8ff083e8d0db0bca67c56d2c1116d870c0. 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/DGA052314850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffc1641fe82022d9910e6b734fa1977b4113a5e6fe00075dbf31213c292d2b2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA052314849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe3d5ff5a98b60234b8c574eb4576bd3ad59b3db47eb4938724987c263376e6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA052370657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcad0f2f3f07013c8cc030b6b2ad7c54be7091b3f5f6dc784d1ab8aa05a6eda. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA072363566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992dda76f1d9517ee68eb9b8c02869f139a5e5449ae7420c8d5e683b28eabc3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA072362027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf7d46aaca37c52a643f23ee31c9390e71976b9b3d54a270d7d635ca2cbf5e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA092318197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ff834861cefaea0138ef37ba6cce205da0b519cecf60a51fbda7fb7ed8063b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DGA092328752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda663101b7f33d9dde741268d3e4464db9db8fc4fcd50a5853d81966f6f25012. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DGA092328753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0561d706e71aad77f307cc8f3e6c1d555356430e81df3423477a72fc8301b78. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA092328754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037ef03bfed27f0338cbd59580e1cb5b2d51affe6c0101772dca6fe5ba5beffe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INSD11947900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9db65b9e68b8afee5d07ccbda18605b0600763d878faa117f0404cf41724c92. 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/DGA052314848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cfb334e4c9d38c638efbd7869916e76e45d1e68300cbb1ef130df54d87b24d. 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/DGA052336618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d30bb8d53a7c1665443d6bd645c3745622dab0d56ea2e514af3e9ca5621ef1. 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/DGA0Q2490380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40adfe10b94df8516a47c395ec48cdbcb73bc3c589b48980cea66c741f31109. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/INSD11949406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb6ca5b8113a419358a16782a4ae80fefb4a0da0597eb38844c9992a0cf8c0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX452567696.