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 0xb36df2c80cd819d510995f082289157b9c69d24eac1797c0379cd3c74709499e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/330c6259-a836-4919-b0e7-26e75c458789.json and https://artists.proofprofile.net/proofs/artist/330c6259-a836-4919-b0e7-26e75c458789.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 0xa3e9a80a0d0e6afc751cd8d7699a8a76f6f0d935827eabf908ec064e99175cd5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLI368358730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1325bb6a9371195ce989f9941706d97d4a8d30084c9ae6d50657149c796733fd. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PLI368358750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f3e74722e2291a5c0bbb9596c5bda28fe2f36901b85a8a8451bdc8ef52c15. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLI368358760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a29194029779e977a824be78a80c5ea5ad792bb5a0db2fd68e27de9a3bd2b7. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:35Z), 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/PLI368358780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc087172d40e5adc48c5047019056e6a6037726183e875e508897d83559475add. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:01:42Z), 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/PLI368358790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0360719fe0db09fe933eac3632c51805c52a6b385128426b338dbe87d9d36d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/PLI368358800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5fd909fba20ce8336fd352b65b3424b1cb439b3882ac64a0348bf78af390ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLI368358920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba32cd079f240088c64c798a6f99592ae7616084eff5fe8b25e6e80cdc5c1dbe. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/PLI367588530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a12aca721a768a77f64052a0493219cba4bf7838707e18b9212d62e9ca02c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/PLI367588551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedcf8aef918c7a98c04f93d1a0f0d19870408ae5e7f3ad9a3fc594548b45cc5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:52Z), 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/PLI367588560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bc70b35749be0bee8c8dd530ddfeef2436de1db744944fd4c414b0cea579f6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/PLI367588570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0121a19ae83e7065a987e4083f80bd76cb8bc8909a594af4f32ee576f5ad8175. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLI367588580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611717d0d7651b3a5a541b84fb2daf66eff4675f1df01c19175c4acf5aa4fedd. 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/PLI367329590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6e925e8bb2d5b4691c849c5494937f1f39891460e4ed0aa878616e2a6afd63. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLI360827101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5df4f7727094dcdb0248ae8ef14c7ee2b5d95d29353c91cd7b127e373c1bb. 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/PLI365183870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba770ec36a5a493f8b579e8af00e5ad4530b6f2c5c6b335754aaf1a3d48e4719. 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/PLI365183860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf31f01f6674a0460b9110becc19f5b8e9ebf8c04f7ee24a93fa381edda7703c. 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/PLI365183880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1c7ef7b781de06951b01bccf08bab932577fa9297efd7f8e121cbb918a25c6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLI365183900.