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 0x39ae4543dcd178828275b447cca8e7b262145e1a514a91470145b1a905a84a1e. 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/161ba327-e715-4522-85b6-329ba4f7790e.json and https://artists.proofprofile.net/proofs/artist/161ba327-e715-4522-85b6-329ba4f7790e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8323d56c756b1eeed78da2da94cb3466001ecd130db5da7b3c5173232380b6ca. 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/DEZ650801572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e2f86f0b4c2f38f815eeb719343e8f5b4a021f35eb5f2d36681538fdd5b14. 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/DEZ650801573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66be3f37d4d174b903029b1705b0229a2484619b4683eb49b5a68325125f52a. 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/DEZ650801574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde60b610e947636998675eeba74705064fa93b503c83ffbde3e9864cadb31a1. 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/DEZ650801575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c598f1425a41484b6ba4a39fe62b3e44e58d027d0164623c0ab51b54b93448. 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/DEZ650801576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07fa5865fad30d3933514cdaa58fa9cb22bef07cf0415f349f69177232defe2. 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/DEZ650801577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682835ce151aac27b331bea0ef17cde9f1172439f5c982ecdacf3a84b26f19d1. 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/DEZ650801578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8488d81f6c4369a2072149f89385d9c8f8304cf6b24ac7efad167770850895f7. 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/DEZ650801579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a91032b9fc47776c3252365c962f4a515fd995493cd09243f88c0fc0c0b645. 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/DEZ650801580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9136342a2d588cd900090f64fd382a75a2d6b22778ec2e1ca1217f1b6ee339. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEZ650801581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee54f9b34a754325e1f0c9d39d0581e73c0ca21c131adc121b7d23879446c1. 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/DEZ650801582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612f040e9fc038aae9cccce1c2441b1e5f69b52fb20fe07d2d0a517774d779b. 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/DEZ650801583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344d6ac1bfb5d8ac40851116fc1f58cc767840684e6c1a06c669f90f323b539a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZ650801584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f808648124b76e87901e516a13ad906a0514922c4f46aab035f957e700ab1da. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEZ650801585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8b82b535eb13263a238d9cc641a94b62c63b186ac90a9b1068d6b32f91c95e. 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/DEZ650801586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a9b98142ab15a8d6416162ef80859de0567cb78ea9fdc87c330c8639267a2. 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/DEZ650801587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf472d0ae0185487c42ffa7be4200995ca48f883ac5ffbabe462d8d1e6e039631. 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/DEQ920600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e68a8fbbe6a8d1a4bf8e82cdc1bd97fdcdf15ac4df88786e9ef3b3942e4d6b3. 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/DEQ920600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe025eed9a6aab928ace9d46d046120c7621250ff46bcf00aaca26fe56286ae14. 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/DEQ920600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd9199e4013b734f3931793024527e86c4df7e6beda652a0ebfdf55d5c3b8d. 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/DEQ920600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb360de2d7e964cb4046fd2c745d30c834d8d068e788e5212ca1befba5568c9c. 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/DEQ920600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e10afdc72b55976d78db8a01460b28073b798e7c88d6a6324ae8eba232e3030. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ920600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43badd5230d6e45c3e803fb2f51041ebef5f0b7da4b776d38f6afbcba1c91ac7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ920600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70abeeb0bb83cf9fcf8c43c91451a4e9425cddba6e189bc23af7f78b86ba34. 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/DEQ920600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa37a6d9276df55d85b489e222c66b6681cb42ce00aa5614464a7a6fcc907d1. 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/DEQ920600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051e591c8fc9709c49eca58b3854f429cff6c1028239f57c84205bfa2b2ca8d0. 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/DEQ920600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0860cbf9f4ec5706a4aad4c3c7b63de1f16eb3a8be39a85e0734d35dc2bce638. 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/DEQ920600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048fa2dd8817b159353493bbe01d70c3650f7d4d2905ac36801391f39e5743d2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEQ920600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada52e14ccdb52f15026b4e4eacd8106f12373d0ce888696d1fe3387a8eff2b. 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/DEQ920600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3b10d5b7612c65294a7ca8d38658cb8c5c1dab5d633125ea0493dd01cca88c. 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/DEQ920600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905bfa993e66b4d3aa53f339e4e273a41a1c31b7ae684322017defdbf440e9b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEQ921800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb360de2d7e964cb4046fd2c745d30c834d8d068e788e5212ca1befba5568c9c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEQ920600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7925b8360be71ebe8e41ccae097f23bfddb156c16309357b184a7efd99a3def. 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/DEQ920700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c4cf7d8e5b45e3b746184d1c9b773fdb7336876af55955a9bb60b3035c4e7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEQ920700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd9199e4013b734f3931793024527e86c4df7e6beda652a0ebfdf55d5c3b8d. 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/DEQ920600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fccbdcc220955c2bc604b6d0de10cf4246c1151df88d5d578158e399f3ccfd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLV62103468.