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 0xa1bc71d4beffc9a361eae1c91d292c3d78ffea99cbbe0d6d1c9f317da557635d. 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/ed09c945-b670-4fde-a7de-0167130d259e.json and https://artists.proofprofile.net/proofs/artist/ed09c945-b670-4fde-a7de-0167130d259e.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 0x6b04697258c15eba64218554706d7a23c93ef1ff765f3fb3d78ac76acc1335b3. 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/GB2LD2210050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a1ab1b2a5a64ab0693483b8dbb7122e9536b3080be1aeac87b81be09d44447. 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/GB2LD2320276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8c9c631f71f4488a696e3b6bf45daf3fd13bcfc6d8d47ebc93a56beef260b6. 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/QM24S2204908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3cf4bb38f4a885a3b7522cf76930086990554ef0c49a8614ca0adcda330a79. 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/QZWV32454175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8688f86f6ef9d18b61735747c5e908d0c25afaa45551b1b04b27be63a1d54f01. 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/GB2LD2320235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828c3b2c3ad53105a24c8a3e12b01528f02f7130d1503c15e0fa730d4f65261f. 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/NLT2H2300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a23f480a30cc7cb7618c460c7b41c21bb6d6d93d3ebe5810f71e6edb8e38c0. 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/QZMHP2349258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2cb0ed0f956c705328584e49e31907bee97925a6b3e2e84f6b67f52fdefbe0. 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/QZMHM2376925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887d03ad28b6153f896807a8374c9e1c6cfadc9542321ca25ad4d211016de0f7. 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/QZS662200546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e856d8cc53f4bdfbb1018664fdb1b70ad133ec14eacd0e2a01ecac54385865. 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/QMBZ92271311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e36d3320da903309fe09444ce8298b90fdf92054ca85e77c1d9cc7d9c2d8343. 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/QZS672111178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a51392513ebb918be035ec3a4596589d3efec2c4a2c82958e66b40471073d6. 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/QZMEP2186266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b3abb92b76ce8be77fd0faa48fc2748a3b7726c65d5d198357ca5b1adc1da3. 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/USA2P2115798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5195978d964110f1df0d785bbb6e20151471287af7ba698016d1b9cc7b7e971c. 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/QM24S2009920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb53998e421dad28b5289985f378962b799e1510a2f2fbc2a608644f4b3ffc. 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/USA2P1954489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df7e20a1726694f1e749685177791a261b9290fad92dd837fc4c8ac5020f146. 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/QM24S1917634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d82801e9a45689a410d7e816228f1a7958b1d354f17999d5a1ef77964e602d. 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/NL1YX2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0117ab3097a55acb424f6d2c9b7dbcd62a11744d01035a13fcf75d3c1603394f. 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/NL1YX2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ada76081e7cd1c44b0e5c59e5342c97e82918366608b69ecf1884386615a20. 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/NL1YX2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc129d86a1d037810d35566a8c8084cb0f265309ea07c31627433b303677e18fa. 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/NL1YX2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285fefc223239e7e4a2ce05d194dcb9231e0e634dd384369c89d9eb90c2cbdc. 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/NL1YX2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752fa4099e7e36211a2fbe2978bb7ce24089fd3d9bc51a48d71626f554164b75. 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/NL1YX2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36017bd33aaf9e3d4a60e95063394068aaa1eb22c7688fb7ed388633bad03b31. 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/NL1YX2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c53451fef5f989fc5051ae9400105cfa10b3ecff789bad29d47c4d2bff685ad. 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/NL1YX2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef3a3dcab79d2e9d2186d571c66be56462cc297e04032957dd8622e63bac99. 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/NL1YX2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4de6d568d5e334d5cd7089d829d6a56c1ab385f26e4a0d9217bba9730a23b18. 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/NL1YX2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5252e04d37fe2d422abd824337f6fadf761327ffb5237a5c1ea55bab57fb2. 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/NL1YX2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377fbcacafa6728d70751f3a1fffe15a82029e23688c7242c8b646b463dc11c. 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/NL1YX2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124427d18afbded660220c9f84424293f67b501beec40f38d15f95d5ee20f413. 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/USA2P1914545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0fa9dce516b7b8c26ff40cc2ea93f452efc6c42da8014f7500021e3f2da233. 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/USA2P1914546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441633cae0ba7c7ea2dca2012c6a6a2e5445bbb31b860d9ff3559ef68a4cfe9. 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/USA2P1914547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66207e1518ab22a3f8cc199be2219aaec72673bacc2feac7117e4eedc18d866. 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/USA2P1914548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8681997196d9bf4584d1c59af94dc329f3839d6c3d2924d7a45f6349a6246ae9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P1914549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0c16096b787285606a2e237b8eab784b039de4bf374a5a50ec66cd326b6f1. 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/USA2P1904331.