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 0x941f0ef9737af37b4ac002008bf0095d6ced49c74ffd799c1bce6efb85af1c01. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9777d89-f7ee-4c2d-a791-71e6fd541172.json and https://artists.proofprofile.net/proofs/artist/e9777d89-f7ee-4c2d-a791-71e6fd541172.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 0x58e728757445bce13394aa7047aca7af77557ab2fab6ef30f4ac765d4faa6154. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:39Z), 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/QZK6L2404216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf35f6381997eeae09cddcb0219c0b8d66aa27a06e70a24166de7636ad9b8c1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFG2440718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ff9b6d5458734c4a3dfc6da97110eb246e37dc0fca54bd6daf79d5cef99be7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:54:18Z), 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/QZWFG2440719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f6fae86391ab81fd4cef815ca359e1ddacd7dc4d92183b5f0816a6ac8c971. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFG2440723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676685a5bae0f8daf15e8cfa85d588c7d486c73409470c97bf25863759966b9e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZES92543338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ce9b6572492c0dadf2db500367fedd71a43caf9b7884c78ba5b7ea8d86b430. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZRP42503058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676685a5bae0f8daf15e8cfa85d588c7d486c73409470c97bf25863759966b9e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES92543338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2878b219e7c609e0569deba66a9567321c538591c09ef7f00232bcdd21cd86df. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZRP42503059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206a0d2dfcd9a61756722b6440cee9fcb521fee8bad98326d4da94fc7a839c83. 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/QZRP42503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60e4d80819304859ae034d3379965b9ff1bb90eaa78a904b644348dd7f1ab85. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6H2575369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaef9b9b9c2c9127d514441cbcb0e73ff2b383f791e3b8f29d84d75817ea609. 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/QZRP42503061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd51bcc2a9e5c93134bbca50151ed8703c0946c8c6bda64c6915843e4216808. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:59Z), 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/QZRP42503063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c195842df5775ffc3d07825981b77553f02ac7eed4570e5233b778ae324502. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFN2559453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096ee422c65ce30a3c14c977985e28fca61db0cc362e179e2904b56f336523f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7W2515208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d23b8b6d15ba22a6935acd2e6a94d1d5f9c42f6d42ff9e7b11248f59970cb70. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZZ7W2515209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c195842df5775ffc3d07825981b77553f02ac7eed4570e5233b778ae324502. 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/QZWFN2559453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8696a6b16f59dd620b759bcf57a6f9ec0137bb61674cc20c6d50698cbfd95a2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7W2515210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660592739990f5bf22f4a47e5a605999e4b610622255ce9ec635bfd794c20701. 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/QZZ7W2515211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00458e63208a0a3dbbf26114315b27a7558aae9045b0bd1f4f06a9b3cf1dd5a3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7W2515212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eb1f14d8e471394f9fb4b9acfd65a80ac92326f69eb84e2f7b19deb25e3a34. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7W2515213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34a052e13bc01322aa4fe45f0187df33cd069ad4b6ea25411851a75a52b21b6. 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/QZZ7W2515214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3769aeff4324a8651e8221e07c6e3b59146850f719b2ae7705f815a47d0a751. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7W2515215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae1f38af4b81eaf52f5340de391e840c42b3b08112dffb28014d7baa97c424e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7W2515216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3d4e9710fd568051700f6827fe466ddd5e5d06288ddd4a0efea005d2d7f02. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:21Z), 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/QZZ7W2515217.