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 0xae4c597c83ee4a0c78d7f697f6f69cff05740a47afffeb7d67a7f73d69ca7eb2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be7ca7ed-82d7-48d3-8237-949fbae47444.json and https://artists.proofprofile.net/proofs/artist/be7ca7ed-82d7-48d3-8237-949fbae47444.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 0xf9d4091d3576ecbff9cdcf822d4210c7c94ab3966a6e93a914e1ad61846ae26c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ZAGZZ0500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b536b23e24f55b94b05b1000af3a668e6ce8886544996dbc79b74f4ad8bc9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAGZZ0500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb97f97b516ff7b1396a87f8769eca1611026d531cf280a4b3d4464061dda10b. 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/ZAGZZ0500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901954b66e40e1b4c2b3162936907b2e41d2a3f70682f71ba8009d05f4b16234. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZAGZZ0500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ad00f0732e5fd38cbf8948d63fa64752fa95f79800bc4b670b6b2808481d4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ZAGZZ0500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e7fccbe95bb2e2f214b4149da6f12ef68ee3358edaa3533b943fd335dc7d77. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAGZZ0500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52988b631a1db7ee07f14dc9743c9567cb53a1f0ece3a3d5ef27f01367d1ab4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:35Z), 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/ZAGZZ0500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf29c4f9217eabf7796128c03327b279555a61e2123bfb10dfa3632d5b7a8dca. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZAGZZ0500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcece8073c2440f0bfe5ddfec4f7b8a026927bffd13da430c14955aeb0588b3f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJZ2492791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb387dc95862478879f23c244e8184cab78ec18a163d61f994d9424ba87da849. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJZ2492792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98088ed160bab053e89bdc986bc651be843eb014af63ddb3df6b23ddba920b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJZ2492800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dea3ae88ed7bacab3857f164e3990b1ad6872c2af9476127ec5a25029291e53. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJZ2492796.
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 0xed43d1389fabca19901c13089522ed9c438b74895b742844363ca0ed7d141243. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZNJZ2492789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3f3d5b3b3ceab66af357735d735902f0603b2ab8438b18a8dd3fd7af062f00. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNJZ2492790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd015ba0d29d552a693272c8db7ec7be25dad6ca2d7fe0469717a31a2a5428269. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZNJZ2492793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de3bf2c5ff925c929d9d3032ed758ea8c1e9a2961d0c074ae6a671cbe31425. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZNJZ2492794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275fdafebd02ade70985b09780eefb6f698cf8e3328d4773acde921be9bb82e7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNJZ2492795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff3b7ba63162a90011021590db9c1617259befec0ee740319895e7b36bfecd4. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZNJZ2492797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe34172ccaf272dd4ca8fd0a6471a23f9a271fd0ce0b6f595aceabd93b20f1ef. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNJZ2492798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5fe27c0cb48f192f3636fef0b5bae00f83349d867b6a92054d81404d026c3e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJZ2492799.