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 0x2541e074e0f972c4addfbb7d1aa643a2db743aec2cae1b372c5461cd8ba8a014. 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/0735075b-85f4-4774-b206-a2ab3ae279fb.json and https://artists.proofprofile.net/proofs/artist/0735075b-85f4-4774-b206-a2ab3ae279fb.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 0xf3a229edbf4eb584ebfe3835998d5d82a1533abfc6e63021b582cfeee726a74f. 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/SE4RG1706405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c9505c54d4a24fb20a0fd063f057207c3d5b602a89241f95e7b3e42f90ea0e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SE4RG1708901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862b9be93d298acac53c79975bd1a85ddefb03e416b046047fb8f7996bec9e60. 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/SE4RG1708906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b5efcb5b6bc56ef34332f8ac095aad54d2c1a163e86b06b876f75e070feb3e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE4RG1708907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf8eb20b50e1c7d725af8f74f091fd2bb7f2fb4104a5edc53ff830af6812520. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE4RG1802202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac09f8667d5dd48dfc7e9b25b714b3b6c4894509d01a92ca2c1f809bd27900e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/SE4RG1802207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a18d15ec9e3908cf9b0f03bb86dfc8a1b6d3de1a7478a58668f62e3084e31a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE4RG1804203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f98093a7a26d0a280841e9644030e92f5ff77ec0c472b2dc7b0bf3d9849619e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE4RG1805601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2581f87016095d93bc708f38e19f604287e7bfe54ad42197534128f2aee0e4e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE4RG1805605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ca5d7709f296bc7bcc4e2a6a0aa0ff6455d0cda3009e393c0e57fb80bc68b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SE4RG1805611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a3021c19234af0160ef2fa3826f3e97bada87e1f3601489bf906e669baf982. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:59Z), 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/SE4RG1807107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35325cc6904503eb44be6aeb76c1165d9495f98263cb6298cc5f923ca8eb6a6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE4RG1927001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599fff1a05dd6b02989d91e6aea5b18713531e6b9c7e82495d3ac7941bc6356. 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/SE4RG1927003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc041ec71cb86ee1f95e00ea84cf89ba9b5ce4e4c09a7b383cfd9065b282cf0c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE4RG1927005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ddaf71973da000c7a2835b0b6439a082a42d301b166a85cc7783de03c4b087. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/SE4RG1927006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e6730c0f13c5c449d0f343a0a1cf818968b8ede705434e0a9097b0eac931d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:54Z), 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/SE4RG1927007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cab603fe2fa9d69cc272856ff6439ad1044efb642ddf4ad95ffc5e6ce711e25. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE4RG1927008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcd2fe32d0d726021ed8c40d67b74b04a7f36e6fda194f5882b892188405fed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE4RG1927009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86be82af1c4d79ff2fb442ee9a1d67bf487830a0740b0af821066e188ee98b05. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SE4RG2056703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded75dc8f5ec782e0a488233bc129a085e51eb9175eeee812348443aa9183750. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/SE4RG2056705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53ea55d9f120184783e3acf95c59d330eafd99c4fd5039c88d6be64403f0fe0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6RB2057102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69645749174a3ceb053c3901044d6d25e97db8494b3ca59edbabaed6b4d34e01. 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/SE6RB2057103.