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 0x5d39be69a34a15a5175b422fc08e92c4ec7624b376c9d3e47c7018cc19971add. 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/7dea1a18-8966-4113-bc20-c59574678565.json and https://artists.proofprofile.net/proofs/artist/7dea1a18-8966-4113-bc20-c59574678565.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 0xe365ddcdf919045851ce61fe3d6b08f02b0d8bfbc1d52a008ee26134763051d2. 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/PLC062411554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c7a77652e6349d53666532811108874240c3e3bc4bb8917af19debf0d37e47. 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/PLC062415017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4719021ba5a9885e6615d3e37b400030e17146e82e6d8e5e789ee292dedae1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX872497426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f62b6c8a7e4a842891361f25661a6ed21f673a990214a7cbcfc41a9ec916f. 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/DGA082457067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35571ebaa1cd0d9e746ba57bd5bc770423703fee927d99a697161b587925e3e5. 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/PLA552500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda427ae4424f68111ed0e35f807335fff4274e85059593ac07b84dbc559d76c6. 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/PLC062402904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6805d688deee54610aff4067e699efb795b838840d27e3201f036c631cce8ddc. 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/PLC062408584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca3564fc760e0d33c07814454141c0c977cf4dc874bba3c7ebe73154e2499e8. 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/PLA552500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c55dbb9adc45e5592c842ce0c5781b9db07739f43184451746da2f886ca452d. 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/PLA552500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc066352fc4747d81cde040dffd29b2dcfc2a0fe87f866876c7f2a10173cda8. 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/PLA552500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025b94079a7fa1a936e732db2a3993567373b47a2fb5438ca31f72e16462138. 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/PLA552500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa468a849e79ed408191ba51d255f1978ff132545504ca7f6ecf2225bda941e22. 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/PLA552500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a94666a9da682338eeeaad88c14390ff7482839b393e530550254eb058ed1e0. 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/PLA552500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc807cf48b85c42138e622e599608c806e5995e2ba386aac46244176c8d3285c5. 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/PLC062390210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca74ee094e261ae13d194aa951751d65712a299ca4fcd93aa7ea9fbe0ba53ff4. 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/PLA552500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b6e5d0b9cc80abfa88e5cf5128992afe918c9a2f209e7008d340484c17848a. 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/PLC062405343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a4d34eaac9656fdec2cbc0712bd47624d683e7033e6e4e310f33e84c44f1d. 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/PLA552500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497bc75fd11067cc7310450c86032281a60eab2dc34e33818f6144d74db9a70. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PLA552500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7e1ab21dd68d20a0d33000a53c97187ef5cc99e97588f2a7c9955a243e82d4. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/PLA552500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f62b6c8a7e4a842891361f25661a6ed21f673a990214a7cbcfc41a9ec916f. 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/DGA082457067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a840b03f88e8ad33239ef7b88b113654d8cef40a040c6e3d9e0e725e6a9fc3b. 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/PLA552500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b2e1e9da219734e328f1bc8443dfa51b3b0766b52f69bcefb77ecfa842184. 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/PLA552500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184870e1bd636041fe4960b0eaa5ea13dc2f1a22177a17d15e811dae3380308. 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/PLC062401363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd716f8d71c397011b6e1c85127ebbb345f622fc5eea9aed486f8f6d8ba954af1. 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/PLC062394819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374564c25bd8aa52a2e989f1af7b1056c3fb1c5827099104c8c15e028cb95a99. 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/PLC062394820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd93bc243825955ab28654f28dea84454d645208ae5aa429717f84f5e36181e. 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/QZHN72429529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8de59a48cf93d13927c9b3689128070b73582f64aa0d13bfdb0d2481092e36. 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/PLC062379562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eb497c59ddc4db70889d6a5af725b77b400bbf8ad50c0820067046514ea822. 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/PLC062379564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8682a8efb0287a2dde3934507bd76e15182a9f453a9a3589a31c055e837d3e. 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/PLC062379565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f16106de7ebe28164447799dc8ad83277906c8872196a7348bea18807f4ac. 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/PLC062379566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419045a536bba67752874da92861aaac641db3f1c86dbe154cc6be382f05546f. 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/PLC062379567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18318d7fca4001c2d01adeed53f1ce9f3f7f892937098cbd7d53fbb85f73ccd2. 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/DGA052475692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe15078e06c80bc1861f8ced308d6124bc411609c483b6e55b5b1040ccf016dd. 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/PLC062379575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d536033f3023c4e638b178fa13bf026e607f596db3e7942114de4a4a7b961e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/PLC062379576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261fba30cbf960dcbc7026db7d0de088484ba803a3e1f0bfc4ecc4d41e5ec77. 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/PLC062379578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93f8c74a3ad0d61a34996decee0a8ba6350b16fb5784e48ceb9d981c6f0f60d. 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/PLC062379577.