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 0xaf3c845c0025aa4d8065b3b809d54c22d30fff615201e022535023c249a62ec2. 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/3c6fb883-c3ab-456e-b68a-3450c64733c2.json and https://artists.proofprofile.net/proofs/artist/3c6fb883-c3ab-456e-b68a-3450c64733c2.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 0xcfb2deca036456b64785fc99a75c6e1908729301ba3779a6de579c75e4192955. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/DEKE50802453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a068b3ac01955841f15d0c56968ed15b9669af69d8f697f73716f92be12c103. 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/DEKE50802458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5346fa6ef054dd61978b62969eb525217789ff1279f2f55f6ac1d0736f5e27f6. 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/DEKE50802464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131498e24568c246b17481be07453cf00f5f76f46925a0309958098446a3e597. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TR0340700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131498e24568c246b17481be07453cf00f5f76f46925a0309958098446a3e597. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TR0340700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e08abc1f02fe9e8ad319b8c65f06f9968d82a3b88c6fec756d10a09341f0344. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR0340700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67716aa1535ee302ecb76078fcab377247aede7b28fc5d233ed38aea05c1c1f9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TR0340700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6dbf9ae62b87584432ab1c5e7e4ca11f98fb5e5a1767bb828b41027321f512. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TR0531605669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a931275effb209ddf4cfdc762786f038d17be6bad39dea09b2fe253df8ed96. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:51Z), 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/TR0531605666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9573c13fbcbabdb1ceb72fd76a28b55e14e27c86104745ded2fc2fe0cff09c3. 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/TR0531605673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fe2ce90d56e1c4c39be2dce283a1af6f343ada7d80b5fa6cbe4f0db4bb972b. 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/DEAR41614415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760516a8074a13036dc9276b2dbefc8636212ac472a75eb9ae4cd773ea31c8ff. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEAR41918466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e636973cca93e84b7219294273d9f2644f52af8e589d23331d20728903e43d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR0012100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec2208c068ec5d9748825ce69564d71d6bea66055a19f7740a32f02c3663d96. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TR0012200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c5dbc976460e3392f87644d49a89145c654affea4c46054d4d9c3e0474b9a8. 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/TR0012200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789f7c1ca94f7e37aef0da8aa4469e7c8bf4180728c47965a371cab690d1ff47. 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/TR0012200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec86dd77494449c499734144edf95bdd1345b6f8cb6d11cd8cee82170f6f2ab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TR0012200646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afa8d325cc0b86fc796bac78a16e4cc858cedee25472b51d4c4c293504b55c0. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TR0012300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400367231ddc75c202c5b18f2d4b06e93ff40365143a7756ca7f15c47810e9ec. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEAR42316684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5032e4799b8339b6e23423439eb3ee5cd4564e2e3192cd942ef8dd39b2b4d88a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TR0012300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a65e6efe55a4a1be18108f7d4c280cc410cb32122b607391a5072f68aa3033. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR0012300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2de4e1f79775e427d1e76e351b2c8a93a7fa0e177e2036a568f597ff3dfb63. 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/DEAR42418754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603acb8e69787a8be0c38c2b4fbd0b468b49104a784388b8c2b74bd290e7d57. 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/DEAR42407546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23609e0a7a40313f7938b8775ff1232cbdb5693fc9531a1e61319f5f8278a9c8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEAR42548491.