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 0x4e8daac348b114bf0d09c4c263e05baa0d22ff9afa2ebbe0b414ea7fcfcfd72d. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edafb45b-cb59-4bff-a7d0-a564e854718f.json and https://artists.proofprofile.net/proofs/artist/edafb45b-cb59-4bff-a7d0-a564e854718f.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 0x4e1f83984797619ff9f809f2bcb533a19dd5a442caa411109f4b18e473c203ab. 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/QZTB62403183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb8826235f8da473b379e8f7ae186f0737b00d722a9bcf36402fd3cdfd3660. 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/QZTB82478104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ad8e897631d0deee799ccb03744e40b3790e5779486b52e5909da38b78858f. 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/QZTB82478105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e2f6c3df99ee647d01943205e6a0758550bcfef52267d05cba831a829179ba. 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/QZTB82478106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64a26ea51223b67511e48c3cbf055bae443623800b76238a8bbf872ccb5a82c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB82478107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908d233c07df1cea69394621f95668b045f4cdcf1c7f75ac6252a3736f1abbed. 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/QZTB82478108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe421ee41e12d7401d619fdde237a46705c2e846fe93b3e2784aa494db228ee03. 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/QZTB82478109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3836ec4564f4826b386df2cfade53271e4088ac04c58da130af01df03e0bad. 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/QZTB82478110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f9ea076fde945be2166e1144b048ef8a3b2a03a23fa2770e25339cfb3361cd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTB82478111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28cf7c6a9559e0939308c3d3660528bec6d2e06cf6fed873d12bf49f7efccfc. 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/QZTB82478112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8243d8023610dbbbb24dcc30a1d91ea5c2ab5374394a173331de154c7e7cc07f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB82478113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975d60fea327ec9bd2ce1da9bc664afd153765dafc7dbf99005ac041760f4db5. 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/QZTBB2422200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206b2a7b04cc4666d025af9b3055d081f42f84285153605fa6b4477fb579750. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBB2422201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc214f7b20600517c5d45b5833be47ab678beff30fa36f1254158f09331f51d1a. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZTBB2422202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4729aa4c8f25cc8d27d4404174e7ddf83ce0d570f91abeba157ef53ba43cd298. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTBB2422203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22f286dcb8255641ef577882de7bc0ce41436d2cbde3694be8a5a62fe877e70. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTBB2422204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475902bec48d68d4aa7f7dd3d45475624ed19c88725ef5d949ebf4c63479a9c5. 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/QZWFQ2464924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26900be20dbaade9094df41b2c28b1d6f0022a7492c095b13530ddbe101a12db. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFQ2464925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5039c0e959d69af485a4bf40c927f4d1d1d90ec931fd0b5da75048464d476bd. 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/QZWFQ2464926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d130c97e9b806c066fccd3fed29dd87392372802945bfea3a64666df0931e4. 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/QZFZ42586695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedcdb23d4764ff604a4b408af26669d827a3bfe651a8c31f965afacb48f7c38. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7L2503007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042816dd0536c907bc5d2f2111595a725cc3b650df0d82d019068b93f0985964. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZZ7P2508383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de1bfe38dfb43e4b663d2e5f71f881db53f2106bb93fe02fcd1955d125fff0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZZ7P2508385.