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 0xaa64205c30cb140a1eb5eafe2611252c600dd695dac7912945b65a22bcf38e66. 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/bd8501f1-1f32-4a58-85c7-ac1ed341f5b5.json and https://artists.proofprofile.net/proofs/artist/bd8501f1-1f32-4a58-85c7-ac1ed341f5b5.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 0x6f90716c07b4793f881bc4a50473991aa4c9750a79493a8cc743dff1dcf2a8f8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZK6J2420903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302beab6c8e19dba73ba00c89b9fd358d82c65287b30a7facf8cb0e9bebd6a03. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZMER2449473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ac088ab2e7a0c659885e7ed65d9e521a302de74c28b24193fb617c24c4bbcd. 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/QZTAZ2478664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934c7576affef79af7b330497cd1c436804bb821569a10e4e5fbe90aaf672b7f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTB72453614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5991ce79697e8a87d76018eed874d417752a04b48d0d4ae8a022d9c1a1a3486. 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/QZTBA2463885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137a33a6d398f11bc10c3d4e29c8f22f89fba2519aeddb16bd203b9013207827. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZWFE2422033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9f46362895b79156d30b2edb8bf476ea5e2740f94879a4a074b44b447a6660. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZWFK2445420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe00cb2bcb6be7c159d636dd574d942e8c75362551777283a5615b978843e8c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBF2408754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa10e0a0af13309ba1f89e1912c17b82aaaa4a3a86a46a8d351152199858e44. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZZ772471912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93c4861aa5eda4d694dd9077f82d5d8ca423e63638c51a5092ce93af421cf79. 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/QZWFX2460202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660ca693491ac2a1b60e75629973f976d70f84727724273e48d399aad902905a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7M2465920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c67542c4eb425b0c34868565dea8cb310e7fc40d1276c776dd2278b82e5afa. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFX2463415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d5f6e0fc8f0b2b6c6a6de08149515acba9349b0870a5133787dab9174f250. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ7M2469072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f4412f0d39bdde3df39cf89c0162b5533f513755d5a772f959ec9b2edf181. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZZ7M2469073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378578e106628c1410a3e62a8851dfae2ddbb33e26acbcf53ba4af9a23f8bf81. 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/QZZ7M2469075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327db55b731b91c4cce23c3bc055247b9fe0a0462be0b7d2861113734594226. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZZ7M2469076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05399dc9bfbe4296c986af6e3d349885fca3e04767955d2475bb254dbb512cc2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA52586847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0cd5d202f170a5bbf5bc9b2754c16fb9b00fcaf1efe19d0f972390a233f45e. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZES52511987.
i don't remember the dream, but i know i was with you
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c10e0c432bfab858b4bbb99331d3e6ccbb60f2bb070cee2b1d633ab9bc0099f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES92571875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f60c1ea4fd0b0c68cc568f02ed969aec4cbab76f53ec4ec0e7419e0615343. 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/QZRP52563151.