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 0x63df4fb389d246a6c1f89ed0a1d613dcf909191d2552dc9f35bedcdeb478abf0. 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/d9ff1a7b-f750-452e-a52f-73ce5581e6a1.json and https://artists.proofprofile.net/proofs/artist/d9ff1a7b-f750-452e-a52f-73ce5581e6a1.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 0x307164ee84e8671aff933f730763d9cac37408237bec0e6964d90fca9baf42d2. 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/BRCPU1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613bff8e0fb6995b2e4e5037345780f9dadc98ad9882b4710321861f127e9090. 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/BRCPU1200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206d5bff61e2e025243384b89402e11830ec9b98c38f3158da0430000bdadbac. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:24Z), 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/BRCPU1200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c153b2c3b2c1b7ff43d63a0ce9c071fabb92cd5420b84960dacfb5be6b0e12. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRCPU1200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfdbea9f3c7659517c695b20dba2b6b1f64f20a0fdd8d9111bb73405056079c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/BRCPU1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36a5f36c6a000c93234d04b56cd04bd15d3a80632039dd8c6e9edccc37028bd. 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/BRCPU1200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac99d98c0e5a78b2d59134a343d728a0c35c170dd0f89a2cbb0e5781b8b92f. 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/BRCPU1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f94f8920b7dabc07b6f82834fe8430b3af9c7e1fcbea3f5fc3eb414290d7c. 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/BRCPU1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7998a9c35d89300123204dc7d2bcdb8c1c06bb27d1da8d7de4dbedd966f51e16. 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/BRCPU1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5499d47a99f72121e5922629af1a2f78900127ce4a9eae3522191847f0e19926. 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/BRCPU1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e9cb8d8ddacb59cfc0478cdf104eb6a3b356de40a106b54367e0dc80ec83b. 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/BRCPU1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20b620a33c279edb39a57b22506e07e780163809f9de8f566f637f0cdf0ae51. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRCPU1900008.
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 0x4d2c74c646f2bbc05830ef3d08587a23020769511559e8cc2ca0c26dc79108cf. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRCPU1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef49e2bef7d6e13d95b24da774b1525a3e900f4ba5552fb6834f5fe08ddbba9. 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/BRCPU1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5e5231ad2bd7ddf772adba2530b81ff2c472f09bff5f3d8095a9e0245f2007. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BRCPU1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3e2d0885f3e0c98afb5527816d83192eb4e2add1319570154d1046afa71647. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRCPU1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb0103a01d0bf01f6b034e32358a6ed0a5e5abf8137fcaf0fe1aafe518e9e12. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRCPU1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974c8c3a78426a128e9032fb31af90bef5545c1140fde9e7d1921632c8323f35. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXB2T2200019.