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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090dac6e07dd4878bf1556d508c163abb392f8cf4a762c1d5b9bc92e41cc026. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f177558-80e3-4f7a-b55f-fa0fc9979002.json and https://artists.proofprofile.net/proofs/artist/9f177558-80e3-4f7a-b55f-fa0fc9979002.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f60bb858d1c2cae96b67a0b024b01743e2570906e37efaa596077601a3f4c9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:46Z), 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/TCAJL2580435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8810815e4dc9badbc0f0f78717700d7db7477295b4119f1fa509e1bd9fa5f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJL2580514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c662138232bfad873105ab1ea2498b9c6a03f151048681baac1bc2a34d91e6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJL2580497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597abf420e550ded0cdcca0e9b437de9b078d65e9b95a7d9ebd144c36377255c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJL2580519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9332a6ad785b94b4f8058dd3e429b3f19b63f3e79a6aa772d7e6733a1d926. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TCAJL2580693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a185c2ee78a81551c5d852ff2abc1d08b93ccf90c913252c057c1cce996ad40. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJL2580775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e43b31324b21aa42a6edfa40c5ee31ab3041fdb36c155bf8f488d5cb18285d6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJL2580782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd807f3d27a1cc1d68adf966377752f9bbc0cba7aa5a46b73ea693fdb02a61171. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJL2580788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e280f9b20d1bc1c43474643dda2f48fa17b9f9a5a80ec04273ea70bcbd47f0b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:59Z), 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/TCAJU2556046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e35ee41568168e3d441eebbae635cda20185c26eee81948193624ed1588c65. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJU2555856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60278479b0dcaf74bb5e3988dfaaea8801a5e5daecd4da1ed03bc1da00f3c1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJU2555556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdfb0719c1e71d5c06550a29944277becd0be49afbe8cd8d262fc10a5aad9c3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT65W2554092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43335762902abc11703de068243f31e53f996f0a4a0d15c5e4df834158efc338. 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/QT65W2574506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11df7e8efc60d79aba43d4a6de47dc72fb8438f5fc0742ed799bbe1bc60cd8d6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT65W2592206.