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 0x3154dc2bc9c8213fd11d90e37e543be08fd545ce33d1684108c8213f80100a21. 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/18a957c8-6a91-4057-9c94-96812a123529.json and https://artists.proofprofile.net/proofs/artist/18a957c8-6a91-4057-9c94-96812a123529.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 0xea79b136f5e02e59c38aff82f60490645d64be0d2ac760ca7cde18b22233f24d. 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/DK4YA1822001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3816c4b0fdcdcbdcd2fa147f677d1b9b60b889a5cdfe5e518354a246813bf5. 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/BEIW12200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed5de0acd5f2e01d16a094c60098f5726dfdefb1ef7ec30bbb820ac1b5470a. 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/BCVP52300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615b434cf45a1b8340eb17bc3de1ac93cb5fd4cf3b67865fbf556adbeffe27f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCVP52300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774c09fcd27f3a900ff3031acc9603d673246ab7ab726ffed5c2141b0034970. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLV5Z2000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4ac73672f32256c4ccab97dac0a2da6ef40c516413d2d5bcc498d36e7b55b7. 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/GBSMU7394999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342c5394503515e7ef4e826bed7a9e7a90cd2f52dd4c10f1d1a72a2dbfd9fecb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USA2P2420767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bfaa8ee260672981d9a775e452811ede206b4c41e7f0af1c9d97d65855c73e. 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/GBKCF2301124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc584361bcf7cea942cb1d6abadfe6595d4b9eb6bf0ebe9893a800f10970c39. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBKCF2301125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c274203805b302eb405757614970182470973abbcc173086b6d512ce13e226. 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/GBKCF2301126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a2eeb5c7068b294b1fd587e67b35be8bc538b625afd392e890df66c61cb1ad. 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/BEB682300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699c1dd09b92d463bb1058d21cb4918d6e6c240844c3ae2aff474617c8728258. 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/QM6N22236086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de43e4636e74ba387ef054de04b515b7cec9663433ceb6283383ef82aded582. 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/ITG412100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fdc777d4d77d4941829cc862f2958070031084cccef3eb5fd70ef75b953247. 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/GBNR52100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a6352235e5514ad7fece3e409b6dba218696c9748043abb00ddba19f1bf15e. 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/NLS242100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a7e9bbfdcea4878003d5bda69eecfdb5434a8d072816df2fd5aec6390a82da. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMFMF2028479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee41efd02c9707ecb74128349d42c8b00ca39c0a53a42aa16c274906880d5f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/NLZ542001378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32e52ecf3a27db9ae3ccbeaacfbb209a8a914679ed36733e1a89e539cdd44ae. 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/DEN062003046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ba6ea27485ce1946f8c235979f2f3f8eec68ccc1cd5f62a8e50311b1b05ef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN062003228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5841d0db6fd2a37ebb86b7f173f3960f7e7af1504ef4eaac510f968d8ef29881. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLF712000609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73fe9c80979c023244a84a20cd67960fbffbf6858bdf9bf2338ee822c740e77. 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/GBLV61928114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1df6a2eacdee03a181d1bf9985d4481208dabc545653e6b02d574b68460e24. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ROROT1921701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5831c219a49eb980879dbb9ce93880fedfbfc63e049e8bfd8890ac046e5549cf. 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/DEN061901693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9dbef54fe889d6fae68ed592f13a53d577e6b0b6d3f56a8a77376d7aaf3b4. 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/DEN061901694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6936946dd7c8928222d3186e6af5192ffd860ea7edc64c178ea1f8be96d50f50. 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/DEN061901691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5e6fd7901b64ccc0c2873cc4cc86ca94af5c676fa686acd53ee5e7fe2e2dc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEN061901692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597f387114a4e936a80f533e3a6a51ed4390728ea92304f67cae3c803c3fcfea. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXHBP1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f63f4eacc4aabc0ec1782c0e5e417be9ce13bb395bb9d2311461cf6d119520d. 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/BXHBP1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9965b892df1f774ed7e6ff3ce189cdcac6f16206ac51465ccc8516fe474393. 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/BXHBP1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485fe813502307ff73b120e203353783647a27957ad419d69100dfe147e938a5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BED901800491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cae0faf17081b74c4f5951de2e9e1b43f00e495dee6ec69f04bdf1b911035. 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/BXHBP1800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed5de0acd5f2e01d16a094c60098f5726dfdefb1ef7ec30bbb820ac1b5470a. 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/BCVP52300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615b434cf45a1b8340eb17bc3de1ac93cb5fd4cf3b67865fbf556adbeffe27f1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BCVP52300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68a0c8230bf6aa733dc3295f523bf1a50a36ed6a05db8cdc1ae5d27f26a8a4. 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/QMFME2293588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e7a9710938f5256c2620d05dc603535213da1330319f8c51660b385cca013e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NL1ZN2000109.