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 0xbc24d6ed4c92b6919c66484a8487b12b49a038f1ec9989674bedc9940ff30f73. 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/2de26132-ca18-47d4-b51c-9cbe5d409dcf.json and https://artists.proofprofile.net/proofs/artist/2de26132-ca18-47d4-b51c-9cbe5d409dcf.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 0x5c485147c582374e14f1e6b6557a050ec92ea766734820c36f3a3e7cc2d9886e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCKG0501438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ff5bb2a81869581abf2f978c66f86a00e78d207913ee84b92f2ee93e27550. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG0501439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7241dc35980ed8dae811ef0c79dd08a050c8424cb2f9792e0974957ed1a4d09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCKG0501440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f40a96c3e60f16baaff262a972905660cbbeef9c2e29fbdb190389602e70a85. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG0501441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e59bc0e955c916ca0e8f5f03f2b9a6b1d7c48d48ed24ff5445b8919c99c6929. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0501442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18b163724c8d08d741339dcf9bfc00417e0cdb681b635040c78d46e6bb0c1cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCKG0501443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d1a46fba17a2b73b510f23b1f52b3dcffab7ab85f9bca3e7988bb7ebf8d50. 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/GBCKG0501444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5758df6bd47b7eec675d0f6294ae53950b8bd0db4eb3e16b0943475a491e5f8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0501445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333add057202e44bd54c03eabd2fb7afe87421e6f515984efc231282c0487a8. 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/GBCKG0501446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724fb11c61c7f10e98e2fd70b8c14d4b78f8e0fb7e0a3d6d777224bbabb36192. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBCKG0501447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276e12fce44a759e13e7dcf5c9a4c15dab57673712f89eccc76f56fdbaba0bc6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCKG0501448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40753d3cf9ae69117b2c12ae6c78ab0893df8805bd038192860346280528e423. 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/GBCKG0501449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb9aec5331c528f482b7a79622fdca1294724b5304262537d4c20a0a3a57682. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCKG1000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4281733b153fbdde07a30f76a365d081d487812267514eb56cc5225743d4340a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG1000342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb075e9f63aa3e6d3e31620290fda034149b1e2ac91cccc0dbc97466655c6afc7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCKG1000343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61a9266b6206e95e569dbef2fc14c27fce9f77ed844f1aee320e6492ac99393. 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/GBCKG1000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee98ccb2f06f6dd1df0065a606bc2997a2ca4f9dad1c541839ace1c9e79c53eb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBCKG1000345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f219df8703cf9adcf998b540da369d5943cad287822af2bd8f1ba967c35b26b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBCKG1000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d7ee45ab1c9439058368cc77ceff5cc804b07be77fc5e233c26b94ca7ec329. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCKG1000347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3041fb9f12941c13ce5ff169e1822a5e36cb95b8a8439c39a54d22c2790df893. 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/GBCKG1000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6dd13fd94b08d58fff322f1db5196328c396a177879bb11a4b2bd0f76db918. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCKG1000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c4c4f3b5c285bbda7762cc4ead48f70936629f7210fadc54a90c4ed87be43a. 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/GBCKG1000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb23a0dd0556c46290941e29748c51e670a291927ac538ebcd9739dde1164ba8. 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/GBCKG1000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f038c00835dcc66592602094b44120f5bbe8cac42301f53af82766f6cf9ebd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBCKG1000350.
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 0xb7238c64c50c010eb10af068f510c4df32eadbe9508483fe44b816f9136fb0bd. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBCKG1000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a3469f79a6b20cac7b5515942d7c11ace991a52c5eab420366e2a1bd8d63ef. 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/GBCKG1400481.