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 0x66ae909fb764ef53d350b1488f0f2cc3b60fc2d48bb17db49af215b79329ccbb. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31c48f42-9932-482d-ace1-b306f519784f.json and https://artists.proofprofile.net/proofs/artist/31c48f42-9932-482d-ace1-b306f519784f.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 0x8056d9860b747bdc04077dba6a7f16d2753368fd4170b210043ea5d547373ec5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/KRMIM2010087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec9435d1ad5c4791e74b27421a49909982c28034d031816f9c6d7988671378. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ZZA0P2111743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c84b5997d81e08240736787fd26d5dd53fee905f9a6ff0343159517ff44ce2. 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/KSA002402769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ff5dad191269eb0b4c431d6e2cdca75b37a328cca0947fac37ae21a7b06ec. 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/KSA002402770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf655ee8d665dbb018f02bd3d5baf80009e2a2e9ca89d21f8ce3cf59cd268fa9a. 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/KSA002402771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d65d85fb603579c3b7af4ec4d4de6853b44c5c202211782c5a6043556fc1d5. 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/KSA002402772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacfc883d685c580b6fb1d641444a71075219b85950522fbfebd934f255bd32a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/KSA002402773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f46547a9a52daf5ae0ee136b11c2c785134c7b99778c9972824a4fda11c341. 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/KSA002402774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c62a90e4e007ec81c8898d61e9301e591ddb2fb322cb7cb2200bd6e000f80. 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/KSA002402775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea02fb7454fca9420a9f6ae6da23918c9ebebb830c015490ffd76523893cb56. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/KSA002402776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43297ea06c604d46e7fa267f3cfa0354854ba51bba75978aeb0587706d2aa786. 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/KSA002402777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f9d383752a04e7711f28b9b8aac37f6a841b508dd89323707d4ab7fff8b6d. 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/KSA002402778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65172acd2863b0746ace51c308dea6f32c87480d7caafb63a0863102c0294594. 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/KSA002402779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246d79086d475df91a7357be4c5fcffb6038665a401c1f1a514c9ff7336593bc. 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/KSA002402780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85456e90348db607053e7f2ef6e051eb45409c3ab6d4399125f754160cab52e7. 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/KSA002402781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd107c4bd5d9db252b20e459075a5ebf235c33568691e482cf11458da874188b8. 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/KSA002402782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea3e587665b8d12c6681c612bb9b68a7690e5f523e5486a2f7fcf3caa89072. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/KSA002500688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee94a565eb60b589504d1a66d3ea4e9a16e46cb1beee6bc22771951228f88a5f. 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/KRB141200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470392af4fb6fd9031f4b0bc55144cdf1ee3e4ac3683ae98fa3dd3e290c3a3c8. 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/US3DF1837120.