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 0x713ef50f95ed8b582d44ebe7e763bc3f3cbe2bf4ba128c3b4a37e543a1dbd1e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6688f3b-33e4-441f-b92f-13d653a2b56c.json and https://artists.proofprofile.net/proofs/artist/c6688f3b-33e4-441f-b92f-13d653a2b56c.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 0x42aed59029df2b14fc4595782e6031acd54e481e2bf178bbcd17e121dbdb2c6d. 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/BXP1A2000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0851273344faf57668664a92cf1f84b315782a143bf30ffe76200d66b808bd63. 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/BXP1A2000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54395f11fe70db674583dfcec451fa8a166d24b595c380535eceddae185feab7. 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/BXP1A2000398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c31f58ebdafb01bd105e40673a38060da788fe77b0ff05c18a402633602e7ca. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXP1A2000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f0e2c0f108a33be9511dd27c139de8ee37d86b54fa193ccc2de1bcdb42576b. 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/BXP1A2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f711418bd4bb4b37b30eab06016093ec2600c5e0a4f4dbe02a0c2b726f19cc. 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/BXP1A2000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af96868bf406c29c32262eb4eb99a7bfab4a90f005bec2632feb9bc81e7d7ee. 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/BXP1A2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b2361a6d52d5d219acd413a3b9f66b294f22346d1b66509a9bb3e5759693f9. 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/BXP1A2000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3f8eec07661c81d7de5183f9772bc1b6919eee063771bf5477d2e4867f0ecf. 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/BXP1A2000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995811911d3f558bd483de469c82bdd32e60a7175cb28d1000842ce209ec592f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXP1A2000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ecb502b2acbb132e5e880fd83698ac3c4ca07f5d77f179f68a2359860ebd97. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXP1A2000390.
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 0xcad0e6ebebf1cc5cca89be2ab68f2ece7adaf9d21bc56da639b1a4cbd6ac3904. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BXP1A2000391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc614e5df804d3a4509b9d6c536e6c967bb38db2fafe00814a7ae74c5adc512. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BXP1A2000392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2cd5c24965024f680aa4df59d43f11adcc851a00ac0ec324de27b372300575. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BXP1A2000393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c88f7005e3a477534352d05ea42f2de1f5f40dce2f2231a9d9f1c05029b48b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BXP1A2000394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5858abd800b594bc6bec1d0cfe2cb18b28f17420c7488bcc0bbc2a9fefd540e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BXP1A2000395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d148196a002e78917e72ae899d816a0848924d221f0f2b44295d7dbd072b1f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXP1A2000396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da4c8c645c348f7a95e6c47bc94efb7959938db1734dded530ef8db3d062599. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BXP1A2000397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda816993a50a514d3cecd38978480208f58f33f6d0f0553e180cf59ca991ce6a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BXP1A2000400.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d3658c4d045d7b7ff2285337e62f7d122d2762ebde0c1f1557567c5075249. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BXP1A2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8307fd88e5f2bdaa59c84c6a588ecb9b958681775ea0c2862967ac06095dccae. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BXP1A2000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd257d8e9af357eff70858b1a87226d6bc99ea56183cc8a9a60ce32bf37e5a4ff. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BXP1A2000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301f132b1b630f44222f04f1f2ef62b1e9f9f16ee819644daced1d6c1e5453f. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BXP1A2000408.