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 0x889f4ca9145c0c243282435a06f1e82d893790f5b05bc304d28c7d8fe5a588bb. 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/0a7bf260-3c6a-4fe0-bd0c-3472f3e2c288.json and https://artists.proofprofile.net/proofs/artist/0a7bf260-3c6a-4fe0-bd0c-3472f3e2c288.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 0xa85aa08d9d6f03dce0843685bd1b6f6d0b4c78c98975b3a6f74e17de31e2f322. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AUPLG1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b9e2b97650e4dcf41fabac0cdcefde112916ce2f91c170a38cbbbff8469f75. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/AUPLG1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf05ebd169e6959701a20a1a6f38a162c76274c3fecf4bbb4e5a31a024383ae. 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/AUPLG1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5913f7f3d46a2b5477c05e9ce40bcf7234b6f9288e6cf820cff10ff18adb681. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/AUPLG1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85aa08d9d6f03dce0843685bd1b6f6d0b4c78c98975b3a6f74e17de31e2f322. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUPLG1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd730d78e023fec146fa54728f7d3e275daf8d5bedc8676ecdaff2fd27e0cd2c6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/AUPLG1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf05ebd169e6959701a20a1a6f38a162c76274c3fecf4bbb4e5a31a024383ae. 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/AUPLG1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3517d88b896b43a757f5e6f21a673ddb8763cd2407e0da80cac9ca0cedeeb4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/AUPLG1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b06d25d3040979164af15e77a67e3088f057317c47bc554a76c3a29824d6d7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/AUPLG1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ed93ff9d9ed80de86e9a8f5f26603bb2189bf708838574673cb5636b0ddb6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUPLG1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4587c5be35c6971e57dafcf72ec50386f372b75a0785fbdaa31a4ae33c2471d1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/AUPLG1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ed1d1425d09502f55c585c822b1e58fe3a2c883a7d646dc175d94a7f501ef. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AUPLG1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ed1d1425d09502f55c585c822b1e58fe3a2c883a7d646dc175d94a7f501ef. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUPLG1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e9d5378611c7ba693f5071e3e4ab0781ed0eba8a20b8dba009e7132c86fd7. 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/AUPLG1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9d67ca60aa19bdfd8013eb71035fbbfeb3dea5ca9ed03170b7e74723158b83. 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/AUPLG1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca664f1b6001e67853bb934eba916967e0821876312441a8009c0fd110eeb0f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM82286887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafba280b21ff2b6a9bc2a54c0c7e7f1e386e6c2ace6a662d06ef45f59130373. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DE1KY2505838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc5d4650d787107812b8474dae616047155fe6e5f589cf2702da2c2e0626af. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DE1KY2505840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6712a0ec1b54b9b07466e168b671f9781fc91f12743bea35400507ad4efb8de5. 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/DE1KY2505833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8e356fe5dafa78b7cd83fc47e49253c8890c534e5ab5125d63fde210b5188. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DE1KY2505834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d4b22b0de6f8a882ae6d3a0110e3a68509c01f512b1cad5426588651adadc2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DE1KY2505835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f27ceece83fe28fcbe10f7ea29b2db102718ed32a1f55e77ad0bf1ae64814f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DE1KY2505836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bb0674b2567e0dde0517d9cc7bb8fa95e04963523eb12c300081039dcbbbd3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DE1KY2505837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafba280b21ff2b6a9bc2a54c0c7e7f1e386e6c2ace6a662d06ef45f59130373. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DE1KY2505838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a01bdcbbfede01bf34d008a5c2e16dc5edd419a8bbd577223d8ecfa7572171c. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/DE1KY2505839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc5d4650d787107812b8474dae616047155fe6e5f589cf2702da2c2e0626af. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DE1KY2505840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddee6a4eff9dddad4d2e375acc5a2c0413ab404eadcb5d6a1ba119f961a2c181. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DE1KY2505841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791600d2482809e43d60e827707793ab163f0790b57069e37beb08db32b1d044. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DE1KY2505842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc919be7c30f2ebd901d7f8ebf943e6d6e2523a1278279ad2ba90359d80eabd6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DE1KY2505843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcadf157cb84d24fd32694325e4d4600cba6cddb9cb755bc0103b4793a61227. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DE1KY2505844.