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 0x9cacd74bf9d67349daf8b8bed8662155d4c345ebfa7980f833fcceabcf0665de. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c5c37f4-1498-4931-82a1-b14bc6281cba.json and https://artists.proofprofile.net/proofs/artist/5c5c37f4-1498-4931-82a1-b14bc6281cba.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 0x65a5bfb61448d6f89c4eef678375879bd6967c2d06d034fd3a989ed4e0eecde2. 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/QM6XS1901905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7181f9c357ca3b3b682fd8d62962a5413a648a0f4cdf7f99a628e9e2630c17e6. 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/QM6XS1901906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10086ea8c3699c953443dcea69bd5aa3286315502a8e56647969dd9ceec3d005. 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/QM6XS1901907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4acbd3c9ed652c6a8c90af9e27f86b84cf3ca4533b0ccb4904c203023a879fe. 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/QM6XS1901908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d5cfdf8061f1331d0c9d9bde1a59bbef0842d4e8382a2590a2dc53366f7c1c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM6XS1901909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7e2ec25101d24f6b4c29fab6d4b8f19e11ec71492c7b6db3bca8203fdb618e. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QM6XS1901910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25ca4950cffbaba50e617d6cca0a388631d07cfa06b940eadd0c241ce801fc. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM6XS1901911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af46533eacdc1f454a10bfdb3240783ab42e2560df795f99b283e6efc282db. 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/QM6XS1901912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f7c580ff080f1efc29724dfc3c8f63b4ff6e4610242e7cea343044c35cbcbd. 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/QM6XS1901913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac3ef9763115e048c6a492414935fde60013529602bd115e6fbe198b94231d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6XS1901914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae9c501ee551931b02ecb7e846cd629a73282d05d9e7958310eac5ac4e86b52. 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/QM6XS1901915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0063ec83ac02179100eb6dad9286a4b236050f12a291c1be38ec1b51294afa5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QM6XS1901916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f12ba8a6fad7e7f49b9edad3bbe8e4ec517fb1ee7c4c5749d7d14f177a181. 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/QM6XS1901917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195bd6f902f35ee647e09b200b13cf4809544f5e1d2412184a8276de84d7be98. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/US57M2125303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fcfdffbb04978ba07452dd52972ba58a4c817b6778e3b7480daca81a90601. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US57M2125307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501ed6a6558c1ca7a01d5467c77c2648a509f892216be97a480eefc5259cec0a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US57M2330901.