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 0xf262564e96112cf8477fbd1f6ad9ccd41849e87c637171b2050d56f420e7acbb. 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/656a9161-4a8a-4377-8776-7b0ddbe25c16.json and https://artists.proofprofile.net/proofs/artist/656a9161-4a8a-4377-8776-7b0ddbe25c16.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 0x0b4d2784cfd08c9de0d66e29448f63dc85f367fbf06ab88668e9b71e4a2132cc. 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/ARF049602481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c2a6e99ce92e2617ac050d6578791b737c695dd5de7f7f4872c6202405a9b9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ARF049501914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa349ba06c2f895c33c4c8c1aaef4d31230da50194401f3ddeb805d23a12fe7f4. 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/QM6MZ1918564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f6aa89e603778e68589b1629c4b160a9e47fcad3178ed58b82f35b37ac277. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6MZ1918565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e1480163cc90bbe0c912f75b368576c55b6ae2a1e34af70fc1a3eedfce2af1. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QM6MZ1918569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378e9d301d7ecae260f7be9236c32c6dfebdfdc85315c8e67884cdd8923684b1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6MZ1918571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed9a0840b93d564f24f4fb55eaeefd48a682fce7b140b46ed9a00aa3c07895f. 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/ARA480900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387c50e19c4b70d6a673b1250c15f141a0aadbd7186e9f7e8058454e9f7ffe7. 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/ARA480900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2353afed665477137349844aa3511ef7c4f9ddcec7b3cfc5365c5d004b597f05. 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/ARKH41400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f094e1fa4c1804c3134992e754a9a5e88a6465edd962e45a3d34cfeeb1632d9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ARKH41400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ead37460c8b46514660ebd6b38cc91a514ea1bcc71215f82fe923f65ef578. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ARKH41400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb413181db0f16fba77e48272193022412d130d83701e5bdbd1e7b23ecce149e2. 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/ARKH41400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f72aa6ac98e6400aa0fe45c201005d5c7980685782e1d59dbc1d658ca798f. 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/ARKH41400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94600fc8d1096a072b6e1e9808dcbc598c66f0cbb2a6395f8acd706e8a3ba0f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ARKH41400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58ba2472da11c6d45f62469b61a1bdaa6c66c8c1ce297272a1333f1e9e132ff. 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/ARKH41400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b49c8ba13c28575e64a99fa8f31c6140a2c034e154d9a19d872153d58990c2. 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/ARKH41400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb2937b4da3aa38621caaf9e05bbdbf4d685e58b8943b45dfe7eeb0fcf4cc14. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/ARKH41400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0b2c6772a521ca4450b8e90f1d71d1fa62262590e7bfa9628485e39b9100c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QM4TX1991942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e801dfd11d28715cf26a755e2a5b5a02cf24ecc2298fefdf6de350a0ed8f57. 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/QM6P41982113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a369a076bea97da5c0af0117daff6e2eb421e314384b92b1b795ea32b259e. 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/QM6MZ2094788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75cff4d53385dc2fb1e520e1d002842d579057d682680b691f3388f7f40ec90. 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/QM4TW2027025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc6973218c739bcc9c7bc9e7092785dbd73729fe60aaffd6dc48b3d70a78529. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMFME1946594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0b2c6772a521ca4450b8e90f1d71d1fa62262590e7bfa9628485e39b9100c. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QM4TX1991942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a824b17257100a0b77a202142795c9445a0fa032f37e0bf179eaf3f0663cc. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QMBZ92063067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63249932ade747d2e0aa2b6b0f6a6de7ce2bc57910dfe9e46f72dc003309a7. 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/QMBZ92262259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129463ecb4dd11c46ea06df0a96441380c0f22e9af293964d6a54ee68ef1b611. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM6P42315706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd77678e106d76c477a15e056d308dce4744ac42018d46eba27c51deae4187. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM4TW2475307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7690d057ba5ba9f1420e44c0e009de508bb3ae17286dedc5b31b734293a5a599. 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/QMDA62551645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031c5d744460a5d17a35d72d399758e8eddf65c66367a2e1c8088f29fb83e1f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARRSD1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48949f09e52839aa870f8f994e10684d114b2a60b5f2f44442d620aabd0730. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARF040100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c90f2a10504fec71b814f7a49ca32f4cdd3f1f37bdde104f35dbf48f67e89. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ARF040200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d2784cfd08c9de0d66e29448f63dc85f367fbf06ab88668e9b71e4a2132cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARF049602481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3573bf5c59b3d6727bee170f7d987cc45ceeb7604c33d83125c5cad45c26ffb2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARF049400244.