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 0xdd36d3d3821f660494ffa5673e0c40ea98921592bc5e65dc1d7fb2883d54149c. 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/703c93bc-da85-42f9-aff5-6c5794b3f23a.json and https://artists.proofprofile.net/proofs/artist/703c93bc-da85-42f9-aff5-6c5794b3f23a.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 0x8a97cf5ca86c3031042221300205a6b3a19003ecce7c9e3c8e61f4e2f276b9fd. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZHN52053583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ef1efa0e0e4ee3921e9e6c29e5ec1d15ee86e8c431ad5f03e4ec280c61497f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWY2163313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d181f2c91e751c2eb646a4b5ace487bcf8d942c7818e9c687dee71a73bfc30. 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/QZFZ72360373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eb20685c8f27a5999ed01c32389f6c1cd53999a735d63038aac0a1ff31311f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:54Z), 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/QZFZ72360374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f272cd81a9e28b434126e5e6bb87c547ba42fab7848e3610cc83d9da8285aa. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6F2350956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc424806b111e575c283d901318d3812d9567c41a3169e90a0e1d93686d459c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2364333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d372525ad90a6e5a26a250faa3c13cfa180c3d487839b6f4a4e1874e734acf. 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/QZPLR2365962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f0f638aef6036d3252f455dbd758caae4489da92aa857b20f95af749494b47. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:11Z), 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/QZTAS2346943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8f363e1f051d1d32aa4ea56740dde088db88bc96ad2b5ba23c7e14c03a790f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6H2414991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb739320a81bdca19c90983d10d2c77bbc79c9917adcd0a8ea09cc6ed48a410a. 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/QZK6H2414992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0176bf4e5cc153611b9161a71af5f16177d16a5879815fcbdca1be6eaa829d. 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/QZK6H2414993.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839651ce48a64d4fc2bd4f44efd687bdd1134d420498cb0054064254f1326806. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:04Z), 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/QZWFK2477917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621d74defd6f188d9c811267b0e011c59f85ffeaaacba3c38bcff572024d0f52. 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/QZZ7S2467844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b67be6f03d03269bc43223268a8cc38c21b7f30f6f97ccf24d1c3985255b5f. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZK6H2537763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb4f2fe2c62b7e3faaf567ab0932606cf6aa4c6a91334616d614cb299914eae. 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/QZHNC2511845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b67be6f03d03269bc43223268a8cc38c21b7f30f6f97ccf24d1c3985255b5f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZK6H2537763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05499c4599285c55dbec6ca1c40d62858692040b8311a18a8ccd82b572cdc346. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:45Z), 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/QZK6Q2483409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ec58e8d4bf387f437b6fce5fa7b4a44eddf30320b1d8b39a5b3f3ca612115. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:30Z), 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/QZK6N2526073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb739320a81bdca19c90983d10d2c77bbc79c9917adcd0a8ea09cc6ed48a410a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZK6H2414992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e21765f11a3229ba46d83a6edab871306b82220c076706a5b8b895a459c851. 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/QZMEM2593330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc522e00af0b5107e03172e2e076c2a860615f2b8011a30ff3c1169909999ee52. 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/QZHN92544739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5250c6318ef7683935b303d7537cc4bafdedbd3c8ec9159143769f6228a0c4. 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/QZTBA2492720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab60fb9cfecd427231dec4e5f2454f5a5eb543bfee05634586c9a0999024c7fa. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6L2517234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7319126d128b6a7dfab80bb7ce72dbf4fb67c62668624fb0571ded7720b5ab5. 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/QZMEM2593331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0176bf4e5cc153611b9161a71af5f16177d16a5879815fcbdca1be6eaa829d. 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/QZK6H2414993.