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 0x8987f78c23fb01deeddb10075010266592fa01b4af2339da5568ac87491b0c84. 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/248e71ec-6dbe-4e80-8d86-92f5d3d1ce4a.json and https://artists.proofprofile.net/proofs/artist/248e71ec-6dbe-4e80-8d86-92f5d3d1ce4a.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 0x86e82b47162546f53035b2857485fb5c8ae15c9dba6926e67b83fdb77e35bd38. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCACM1646407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61870cf894ca3cb4a49aec744015f4059723f4572956f21c5824acb5673fafb5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UST8K1696136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64447e475641c2ecd4e0f2a7f437f1bc13f0c29f9a47f9eb3f78254edc7466ac. 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/QM2PV1726722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0ad1f547cb714e5a326a788bb2e8536516aa4a9be6b200a664d4204a45c08. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM4DW1765153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf63351f616da916092aa8ec48957804a1bcfeb2b76fac9710bc038ac5e9c671. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ9Y21786804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13010f159bd97e3fd1eb44c5d311fed310bd567fea3bc99118cf3cbaae723bc. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QMPKX1875973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aa06b1277544075123f79318601bb2698cc1ac57a8b86b0e9b315821580485. 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/SE5VF1900488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0829da40df34c702890d081290315af0784056c931667c84e514cb5288544fd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:18:41Z), 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/QZGLM1920121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80e56a987ae5345f6ef086aeac90c7982402c9f2b53093e7a25a98f78add295. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZK6L2105559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07251543a35acd286fc05c7adbf54a625857063dd4a062831147922654933d67. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZMHM2090219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145c7e88f256641be1ab718dc5a055a4434932f5c2b072d0a53e0f4faa0cdc3d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWR2160609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899429f90a8f77a42cecbaec821c1db3e1c48063163a03036c8ec9b971c2f14d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6K2263769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f910c9fcb73e24f314dd395b9cab718671f08312f0f87f22aeac993fc8cc36. 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/QZK6F2243358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbec72998c5bee8c311881f450c3dbcaab743505f94f67bd9c8efc1ce1ee4d6f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBA2236636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbe53aedde58ae8b8a55eb2566e3bffd25356b2acb9f1fdc24b134416ec0220. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ72388827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a423dbeb4507586c1f94ff4ecd88634b63c5616f47deec8cce7062a48e7e758. 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/QZES52319503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd151bab14586f3dc285252e72ce56034da2cbd4a56538a5c9f910746533ae. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZDA42479893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aa95a7302b42a1e8edfee3d49749ebe2246437fa2f7022f91a1a216dd369e2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZQAY2413291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2806b37b006e9e6b90253cdaae7da5aec7e1cf4aeae57538ba107ff0f4d797. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZQAY2430736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc3a51a110f3a9d5e1592dd7697d4f7e582954059b4699268a3a646f640cd1f. 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/USZEG1600718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec1ef4ad557dae0bdef98263bf73dd11cf8554692333ae56a8365dc0b99e6a. 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/QZNJY2334676.