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 0xf44c74809b86ddb6910b8319515edeab45150c1e201a15abe857e32fe19bda76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92911e01-c33a-4b20-8062-c884a5b16f00.json and https://artists.proofprofile.net/proofs/artist/92911e01-c33a-4b20-8062-c884a5b16f00.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 0xb3ac6d740b3e8da1763e40f2acdbf842193cc00408370262e1dd75b9bce2b0fe. 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/NL1ZN2301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba80c49c7b0e48bc498a05f94381c561259d9a37af2685e3a7525011c0bf6ff. 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/NL1ZN2301978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c52f3f8ccc3d1d09e884a5a05b7014553ae1d893a6d995861734a7a3e4a21. 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/NL1ZN2201988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee73074e36fe2c30cc495b2567e00a17f347d1e4fe54c9b112bc489b50ccfb5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NL1ZN2201989.
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 0x131fed4d4743f36c317034dd6e20090b47dba5392ffb69a12cef8b8b096d0cc8. 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/NL1ZN2201895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e8b661a74102da7eb11ad737f87e8c855303a9dbbbdccd57861aef2f8365c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1ZN2201896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e27d2e50e1579402ec56e2883da0dc9c87ed36b4ac7d2a76bb98b17ae767ec4. 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/NL1ZN2201793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cb6c9f3c57a1330f01838575eae6c0dd5c5cc50ede2853f973f745f7a20773. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NL1ZN2201794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0751818c6efdc191e3a3d8581371c2de28638553386f971356c44f053b654a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1ZN2201773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627da66b2d8dec9b570208bc5f20971cda67da874df95c48ff35fafc2228eff. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NL1ZN2201774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f132cfe64e02f29a5fde591a44a753f445af0d9bc6a3de0b7793b20f38b911. 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/NL1ZN2201763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ab4a02711d32a8bec5727b99bf5c6832ffe0c2ff3066bcbb52e45fc535458f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NL1ZN2201764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9418912f3b7b1e2eb20db7467302859b21ad4b1e3c19327e0318ea0c9430dcfd. 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/NL1ZN2201636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce5981cf7399b1cb1253a567da5afdb12a493fd28acd471b243400fcbacdc99. 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/NL1ZN2201637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f319a521f88c7836fc920f86fed6e5d3081586ab22c4cc598a5b6275df9a46. 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/NL1ZN2101600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af867a629a6b8d9fc6e3ccbe747cc41b936d60a30f687c313ae14696923f4ff. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NL1ZN2101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5594cf099abf66b1786aa5d70fbf1dde1f5a8f841835c5389b3b9c97afc04dc7. 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/NL1ZN2001420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa969e2d2ee41af4ce13f5b2e493305b44f75206fe69e7d6d98032c3a0be0e3a2. 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/GBKQU2183697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1d6765c6e9e69c660238bdf0145c8e9992e445f9cdb755aadf846783393c6d. 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/GBKQU2167596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3af250dcf47c63b33a9b81b9dc0536a095ad8fa5754574e579e5bf1560c48. 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/NL1ZN2001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc82bc9f60b068c0a977d70df2cf546184a22873092998456761f3d400a2427. 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/GBKQU2127817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc26601b11516505eef3ec733842fb26a9fe0479e25c1a8471f5d67d584fa5f. 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/NLM5S2001049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880bc90498480b8c86811c22d76df1178bcb0b27d9430dde6e589429cd425e1a. 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/NLM5S2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d4b3516fe48217bf57b2c6a52de461d63bed0063783dd94a6e5431fdeaa851. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLM5S2001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97c52e4f316a2cf41a402c26a2868cfce04915718a184bddc6f74091b4f8160. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NLM5S2001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ff2834d517c38dafcece4d9ce9d0598ec45175a0aa38e50163974a1ccbc5b. 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/NLM5S2000978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdeb28ff5873bbdac0218ec0b85bf1c10f6f05729efadd9aeb9f674acf9413f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLM5S2000979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21506b4c858d14b521fab64b3d7e6d175bac1be2461b7d44dcb727c553f3fba8. 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/NL1ZN2000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0996bb43d1deaa9f9ddc154838b5dd80a9ec3e02b81dde5816ca501aa283311. 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/GBKQU2025918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54795a303847124f255809642c237533683780c8885e72a2ff5f35260acab953. 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/NLM5S2000763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8399ed97d9e4e29a1a2b8887b023287fa5abfc07b4f86a5cb7315a14882915b. 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/NLZ541901768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a3527ee9a81386244e6cd6a674c30b9fdbc587f6bcb353825f2e164d88686. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEWM91900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6865701db8baf37ca0fa72f5c9cda5d9200b03018e3220effc50a5cf344cea4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEWM91900294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd05145ed38d2196d974e4826b484ca689ec359080b20efddd2ca8021c6d1d. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/DEWM91900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f78b3718f6a99899ad3cc262bf3ec27ea946d482a8f32a7a53449a5bf89f3e. 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/DEWM91900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121e407ffbb1b711282f16552ce57747c396134de10d92aa98314b03d9994270. 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/DEWM91900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d212c1ddc4f7e2d0c094364416866cf51f9fa8ae33ec5fa3c40fd73876a292e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEWM91900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffedb7deb5e46eaf47a649bd6fb1ad4566fdf18327b06c471b720a29de39aa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLZ541900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c747e6e170659ffc3da5a623c22ccfc4add1cce12c6bd1805077fdc0cd122. 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/DEWM91800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687c211d9b5d7cef91cdc0c2cdcf07d07c424fb9d796c0a973831df0e2a79e5. 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/GBKPL2083291.