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 0x7992fdda546ba10e6fb9c5c706027f1e60a0a205378cb2c993dc966caa913ace. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b099a0ca-6713-4f7f-9630-691a8198dd81.json and https://artists.proofprofile.net/proofs/artist/b099a0ca-6713-4f7f-9630-691a8198dd81.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 0xdda13c7128c669363e87cd14276668e874580e15a9fd9e9c50a325e49b462dea. 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/GBJCP2428302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d1458f647eec72c83ef65e4e558f964f97004586c75507961e8f37b161fa46. 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/GBJCP2428304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8790527f443eafcd9f09a0e3707d9c56d8ab5fa1d097e4a20a445a9e33f03ceb. 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/GBJCP2428308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6c023c5fdb2732c511d729e2ddbc80ed8a383726bd16f28bb13ab40e41f773. 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/GBJCP2428301.
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 0x5140367a491c8dfda856adf0c20f52f31928c9c443ac9bcc6068c7d1802060f1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBJCP2428303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf2c2675c35d742ba61936273114b267bd5b68f0b58146e4525259c24790a84. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBJCP2428306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ae789bd7079a2d479fd3f1ba40d5854dcf1d27d1d1a27096541d8d38048d34. 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/GBER72100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848b0b3291ffbea6b56939876d7219c9f221d19cb3c579841aee61bda0683545. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBER72100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a2dbbc9c6126f08d14a88a4cdf8e14f6ce24d519b490477d941fbbed7ac9de. 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/GBER71900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874233a3862ae220c776d9f8e6c99e331c6001f0b7298a7055a4c3d4a47c3753. 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/GBER71900614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1234e0579c1fd1635389cc007450e70ed0c35ef26858f220245eb14809d0c6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBER71900611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f868476b624c95a2bd781efcd218ddb8d43970676a75c1fbcd622d0709c7c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBER71900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8166fb23cd262b3950884088bdc7e647bcb54f49980b23c8b85ee998323e2e9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBER71900615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac53cb2864b601d7717450f3cd2c204d58c386b6dff95bf1df7296332306aebe. 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/GBER71900616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2c8b54bb77b331b8cd13206feea512d10395b0ab8400bea8d0adcf4c70086. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBER71900617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278d4d932c2a19a0138e6f1cb7baeab3fc218865804eb714f24db9ba2659ae4a. 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/GBER71700388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a43f56f65dd3389e0f53389427e1b10c002b936334fc8fee6d017107e73fbaa. 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/GBER71700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde6793a65e84d111045c8ee554026a2824d01934c5673603b94e6fcac97bc7c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBER71700390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad6a5f07231eb51469d462f7a80cbf6407e656bf91ca215247e6695627897f5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBER71600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d514d2217e9b8dc645d284a06058794013bf4474eea2a4818a6d01b14baa8b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBER71600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23cd4b5053bc5d986f83d82a85ebe4b28f7b66f28e46ba90df4e2e8f752818b. 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/GBER71600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab2709e964fe1aa0273a8b06b4305796a145fa347a285b8e960815d92aaa56e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBER71401193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b98c2ab4c9d1261fd4323e4b65b8618d2ee513a03fd91242fa4163e90f3e65. 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/FR59R1568745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6575af1c9eafcbf5d0efb46435a75cae0461d7ccd771dcd700a2885dc0c83ee. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR59R1568744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe08fb72e11f56e73138588beafed987946f4389ffa563b831a6ee4b9be0e2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBER71401195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273acd1a93069a00b1c09d223e1656a1d49aa2b652c1dae1086d65dcccefdf7b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBER71600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5193d07ca67608fa66e9e4f48146a0848f8c05b9fbac3159f0a1a2c558be541. 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/FR59R2196790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d6dbbe41dc86f5a0d3f731acd386be0366a44c74af19007b65a7dca4ec1252. 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/GBER71901896.