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 0x02eeffe3dc8baad153fe39bbe5973438aa9ed0bcdc454b634769662347eeb5bf. 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/5cabdf21-0874-458a-8ae6-d079d8d454ee.json and https://artists.proofprofile.net/proofs/artist/5cabdf21-0874-458a-8ae6-d079d8d454ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Composer’s Choice (Original Game Soundtrack)
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 0x8fe8505db9b58db0c33176f3beafb672db884df59b6d32f1158711bf55e2549e. 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/USHM22113452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27e16f7da4ef1aca688eff79571a56ec39f846f8600d4b4d27eb2cc7a320abd. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USHM22175950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa207b687d64930a122268279a102f3cca52c5a4afca48b32e587c177f52d7f23. 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/USHM22113456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a79521592d41737d075af26318151ab43b723db3a3338fe568ce88fde99114d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM22113457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2659fd68ac9e984b886881f448d83be3a97dfe04533a88e17c07186c2a34b355. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM22113459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ec16b6ba159af3fffae3ee93b94cda264ba21677c6b8447bb5713b5484bcc8. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USHM22113460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29fd5e00b0f4f878db72bd03b33b4b0d3c0cd4a72d9e888d28d83ddc478dc0f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:38Z), 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/USHM22113463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262425081320e74326822fcd77a32da9abace73aee832b67dfe611fb23b2ecf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM22113464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270726381aebb3dbd3e7c5c0a797a518305ffa25d18f217147dd05b533aafff. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USHM22113468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf9915fd3a0a2644202f33d4e17ac0d36fd563be3a3e12c32b09f6dab327fde. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM22113472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1e3badec5a47e6d16588d90e42089304bef915c1b989630fbdc5028aa1c2c. 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/USHM22113476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b62c2a3d334c231f40b29ef1ad081f3e663da711d9b0ed847ac346319ad2c7c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USHM22113477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4158b3b391b56d0a6270bcf51014ee1e05b1f0c855218a671e762b02b59c4e6. 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/USHM22113479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554246ad97380f5d12b8524f4308a77ac5e1a57fc0b19d1f7818d4d1598cce56. 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/USHM22113480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bb57701479830a7e5ec01c257b40e5ea4620d9bef371c3db30db1d3f945588. 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/USHM22113489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404bb1d30fada7cbba9b299e7ac97a82ca5cbf66e7d299c9cba1b6dcf715f1f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM22113490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fbf3dfd7a4a7ddad5e49e54738c3dd1252059abdd9f2605e9b3dcf5140eb00. 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/USHM22113493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be992b8a0242ffa08edf63880f1f070d365e2fa861d924abd71cd355f61770. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM22113496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0970340f1af87e0b1a52ab57509fb121fa752ece661f97ad97faaf0d7a07b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM22113499.