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 0xb512b9cf6a5340e758837ed6eb41a45bdcbe1caa9be1d8b33ebff9806a1acf78. 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/d95cd892-9ed5-4175-9ebb-0174db4c45c3.json and https://artists.proofprofile.net/proofs/artist/d95cd892-9ed5-4175-9ebb-0174db4c45c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xfb169a7e43fa30bf9deefe4ed854c4a45717c2d0c01c760c354626e6031d6187. 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/QZNWR2105192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26d558aabbda8b0bfd05410eca2162b23b6e7c66f7aacaaae829e4e1ba54c0. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTBA2272560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219ae4978f0ca44d3d4ba59530fc77f3fb0a0f874ce76fae94b0a5a822ccdd5. 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/QZDA62320007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0849b12201e99a87db196def60032d076061aaa47a3a6261361afc72a9253008. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN42396167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0e18432e64903ee9de9858bb796cfcbfdff88e3015027bd7e36489b124b08d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2304587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7869960bcc28ba951e89811d574967939adff257c8cd6ae82c461b69ade7d411. 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/QZMEM2304588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab115e55ac71e37041aa9ec636b0396041b59662f0ed9822a7b04218a8cd22a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEM2304589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa192fe50549aa5e092e44ca278e53d8411f2fee26c68b13164dd6e07c90ff44. 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/QZMEM2304590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08581671f5094529ad15b888a0ac9e3ffe4c8a2bf585108d582017ed6dc8511. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2304591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d05d4d7aab3d08b353b1b1d384dc8ec270dd1db6b5403c16472d4f72497b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEM2304592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b150c7c06123ae62348c5b8ea10371f83ecac79debdf79415c695280444541d. 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/QZMEM2304593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360e46205b646769c7d441d41ebda70dfe11317535459cfca4466a3cecb0a208. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZRP42389174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39c6ca3e30a72d6db4b81d96eebb045696705ecce1520917ff046258788158f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAZ2355210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba9289e71eb37918d3050e0b00a9a489cc450115ad95a1ac8b8e1c85452a24a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFG2333090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12123d1765f4ddbf39382484dcdd15dd73f75f11592ab3b11d224ffd6aa2d121. 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/QZES72499823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad00d13ba46e935caf0b0a2303c966b4af80808429b695020ee2cb4ab86ce0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFE2455085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb66ecaa00afbd51291b00c1fe6c737023c916710da2b2f9bd8c11202e97a17. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7Q2442428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a0894c6e1683c91da739c229eea5646c985fbfa41dc4df71223756c2aaff9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3EZ2482871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7b727e4e417021ec2dad6de11007dab6eccb19034729d5c813aec2dbe327a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUMEV2524349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d0810409899a63ab80001addb9ec1662f75987d950f4ef0dd2234f02f84cf. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AUMEV2524351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9bf8c31db23cd1bf2e1ce2048c83a55e6e0b54b16072327372e36289c79c3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AUMEV2524353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f44f0433cd00de76dd8835d88facdf0a2e978f010b73fed0ac7c7c0ea55143. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB82530295.