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 0x0b1c2b24dfc13f646dad63df2c459d27dccd4c00358706d6a10d7a38b6abba65. 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/ed36ab25-7e2b-4671-8c2e-da39df604bda.json and https://artists.proofprofile.net/proofs/artist/ed36ab25-7e2b-4671-8c2e-da39df604bda.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 0xfeea9259b2e022c22f552096d3155a2d861bdf59cdcd7b30f8ff463e36d108f6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCABO1332881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb24360081df1eadb89057e5bd308d4ebd011f901300037d2cd44259c666139. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCABO1332882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1d36a5162ea783b0732e25b40fa6a14ee65e0c124e100fabb21bbfb980ac5. 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/TCABO1332886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dce7331f3fd040f96b13f92550ebaaf235c7ca90004848990a7b8f0f515b6e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCABO1332887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33efce3d9a0070d35274056be188ed899ffc49ae5f7c66b02168a6d7e67f626d. 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/TCABO1318055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d58b9d9073204526a3a0f3f158dad87bef1f6fca23691e1d0c409516e50d60. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCABO1318057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe194a3bb47d821c0053a76cc621833c9bd29318d57084858a9c6652e77fc38. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCABO1318059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6939039cf71a149884b825b5a9e678d04a13d8b3df4b5967022fae941b9864b3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCABO1318060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32425cbd910cfedb28926ea859c1a6ed05958ef88b84066888d2d5bf51b9878f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCABO1318061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb526814d25d1f39db66f27e145b9c7e4b682a3835e8a7d2abdb5e60e96987f1e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCABO1318064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4be6b7374d17a5d29ff44b8f265ea18204029d75f8d1c03a1c33d7ffbd013e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TCABO1308356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862fc21be43b9ed94f5b8af2f4d5c416bacf706dcad21efe2ce8380eede30b23. 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/TCABO1308359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf07e2a284ee71026b72170f27aca7806e8e061860b44e0106040586f669b4e. 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/TCABO1308362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946009fdd95e585165e7e24480e212d657dd91861bb39e9d741999a9e85ab590. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCABO1308364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40661404c68d39c85589f968a1be242c0527bb9423728674dc149278c35fe301. 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/TCABO1308365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a4438f82dcb83c733b6ff7614a8c1bc92a171c00f466338b7249d17e3b54fc. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCABO1308367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef4b6dbe1832809ac38e08f06f5c60e108d68bb12f408ecd990dc65a9fb4a34. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCABO1308368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b49e8030bf20cf0043ccbeb695ac8020971521d8b8266d9d88d0cba1eb69a85. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TCABX1406158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda625c2f88bbd3dad8d01fc5cbb4fefffc22dd37dd9e7a0850e6a91c9207dd2a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCABX1406159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e63152a7ad054e82aa4538f0781dee5624eeff982947dd4e4f37ed032219f23. 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/TCABX1406160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e18e2ce4fe423c6b5ef58e72d23af61be1ca47a1dcc43b94c91716684a5a5ce. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/TCABX1406163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc186f790e6810971cda33d9a754bce6695149cdc68e2da35388fbde698500282. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCABX1406165.