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 0x4c676c329074c8d69798bdaf22f44e68b3cac69bc0bf9528b0848b2c7310d12f. 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/37be8d28-1140-43ab-8079-41752f608bc0.json and https://artists.proofprofile.net/proofs/artist/37be8d28-1140-43ab-8079-41752f608bc0.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 0x5a58a0c0988c6cac9c6d2bdcfd44762b316f101ee66865634d119a5175cbb6f0. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/FR96X2115417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7b30ef4500eceade0bfcc56810ffac0beb6ad298a91174f6b138d13f2088fa. 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/FR96X2115418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d5ce8e5043b1aabe994b27244948b3b69559e8c8f400a46d32edd4f01d9de3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR96X2115422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5179c30477e84ce87e1ac9d3f776505e550f6c1f08018b3bc5f90d5faf74ae. 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/FR96X2115424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c26b6befc0df9e17b6462f249e61718b47116ce73e372965f30fbec8fc3165. 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/FR96X2115426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeebb5d377567b5ab8a082a6ba13d4718346b3645fccff157ff2997f7f5ac652. 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/FR10S2150431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31355c402cbe4137154506e5fee82fa3b3e43c1275f6fbe3cfa57858e771056. 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/FR10S2150432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61bc2ca5fcb0a594f510ae4c58dcb7b915f5df19341212827d64f0c0bf98fb0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FR10S2150422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb004a61f6bb7d4626794fcb27bc1e4027d03a5bb8118c9dec3192f0ca14a40. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR96X2115409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e72daf3d43bf8b1e22854450a8134937e3d69e8ac26c0fd25065bfcf00f7c. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR96X2115410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe145f56d8699b307e7e65eebf1ce4ca69149795bb940fe041161695cb2e4a69c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR96X2115413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95b56a87c768a32ffe030e2919a8fc26a79dbd765c03e38f53053b6145aac02. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FR96X2115414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b053bf30f3b2f143c76b5fbdf2c409099eab4031389ef248b5bddf04e7e0f96. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR59R2145665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486d1de058eac0f639a0d1c2608171d840a5b254333cb4494730617237e6c304. 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/FR59R2151037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434c2323e8a8ed6e949fe4d238a8c393152c4514436d9be321a57fa8cc79ef0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR59R2151039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd03dea89fb5242d785a3fd58bbf8b7a4db6d576ed57de048b073d4ad6f8bb7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR59R2151040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b4a4c6c7a6b14d94fe05f43e946972b1a2c83f07a892dbb2dca889b43f36e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FR59R2151062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c1f35e234630fd666f3e1dc33e475979c1ae7c91d24669d078a6ed19b5081. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR59R2151066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d07bdb731ca88fe33cdb27fd9e6ef965c55e88d4f89bf6bed1ec771886aab64. 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/FR59R2151067.