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 0x3f484c13b8fbc5ddd7f6f998af23802ce3db92e80116200341c7e286d32e7ce8. 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/132f4126-87ee-4de3-bf69-6dd5ab4bc9bd.json and https://artists.proofprofile.net/proofs/artist/132f4126-87ee-4de3-bf69-6dd5ab4bc9bd.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 0xa0a5d55ca46adc223291f51f1bc5ce855b829bc229140ef98acc4d92dd2f7b85. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CA5KR2323428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c358781b10809467dd8e862e48f032c245407350b9b127ae58568f245005bab. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:05Z), 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/CA5KR2401866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c59b25f84e9e709acba761aa8136ca30456ea9b0db6e3f3fcf94e2abebeb50. 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/QZG2X2406492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c004afa07c663f266f7be8af8c9aac7bfefd9421bcb6f393d5a725c5a9bad0b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZG2X2406994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f821cf3ec6bc2f2217bf816c294fc44703f01b37c59cab5ae8ea009f4df0ad5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBBVL2506791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb895a2e54c4025c496d3e7eaf63a69aab915c0da69399db93cd2b6f59615576d. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBBVL2506794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019ac20ac86987489be3ac8b9b83e4bef66673357e300aaaaaad6a65a8d9c57c. 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/QZG2X2415855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed63a7d07f408437e58603e3a1df280064b61a805602345bad24d86d629c702. 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/QZG2X2415856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba8cae6fd2d7b3ee9d1431b3a957b229f2bcaa41f1ad8086c3a7404f807e42b. 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/QZG2X2415857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd96c45bbae7608a8d416826b2f1deffa34e9bcda589f4ddd54fec5431a6418. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/DEH742515289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a80a06099d764a2359990a76f0b431996eade3f2c16ec44f7853c0d395e27. 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/DEH742515291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31c9c08de012887995517f0c0cec8a0841d40170c3a705bcb071e609b959b8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:49:37Z), 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/DEH742515816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1ff54f56b66d92013b69c94c8b0d53415783134281b069e1731a56044fa1f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2463742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81d2e52edf64ef7142950e2dda6a2bd999730ec4693504629432f34f7a52e42. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR2416406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1989c70b7822078321422618d2dc4a9e0792700b52dcda959854b37343c3a3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEPI82326394.
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 0xa63e3d6c7a606589602728777c35b02f7c8f29212be4dd3ffa84d69bf80262a9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBVL2467504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16eb475ea0f5e9f4daaafbbf49540a98c58c720aa277970ee3c4bce2ee2d8cf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZG2X2411504.