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 0x2ac6a4bb25bdbd81067e100df7bbfa24d7b54dfdf20e4c3739460b0391d343bd. 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/598fc32b-3b1f-4b1d-9076-409ed33e1f55.json and https://artists.proofprofile.net/proofs/artist/598fc32b-3b1f-4b1d-9076-409ed33e1f55.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 0xf3efe85c30548a3f7300b5cbf997d6ca6f340f9edb48aa173a26012507497d74. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:08:05Z), 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/QZTAW2375236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacb7eafa242818c5d5459377fca39b5e0d331ec01d9400a5e160bf3a9851dd3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:03Z), 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/QZTAW2375237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b4597dad1d1f5daed0ae78f10b0c15fd634e6d5b0b532c46b37d3bb4aaf0ae. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZTAW2375240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729597cffbd36c1395dc2044cd57fd056de199a1ab9f88d7c3d8ca058ddcd8af. 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/QZTAW2375241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ce00816053270adc15e531f11648171efc7ac26c3abf522be5e82799542466. 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/QZTAW2375242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a04d306205cc48593e5acb4a791caa5a8278d5601fbfd7e4baeec6d73acd26. 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/QZTAW2375243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c9805c14f9e9c527d829bfd246bbb63b6d3bc2b2437ca3400a6c1f0a144837. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAW2375244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2528523e4f8c9131e8051e6dddb66ea108de7fb4e913e0acf644d5ca7056a32. 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/QZTAW2375246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b30f3dcc8817f8fc62f0c046f8ef6210fc8c923d28e8a77bccff92ef9c0de. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTAT2427920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d0f06c99a6b796e6c7d6adbaee36bc4cd87ef3235df03b91e02c085de5992. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZTAT2427922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3ca1161a8c5c96c4e8cf18aaadd9fbc5516a5a976f4bc81bbac7075eae85cf. 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/QZTAT2427924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2897760f011abad8e23b8d0f66814f397779b568ecd331f9e2f5ccbe610b6eaa. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:52:36Z), 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/QZTAT2427925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe08aff4cc36c18d7c587e906f46e8ab02bfc86d730b3f551c7d59184ce6e85. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZTAT2427927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade0bc08346641103b2cec80b0a25134905aa949f9df8b08e98e86b1143aae6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZTAT2427928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68ca1396500fd5d899657ffeb899b846d4f3e8df6c4cb982d505cc79c5871cb. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZTAT2427929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bfc3e796fdf86372d3f72fdd3f51023ce70550bfd2b8ab09fefc2a5d31240c. 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/QZTAT2427930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc22a3346f2997bce233b0c778934b001b1a8e05a352020df2ebc56d9f43c7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAT2427931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc029456001d8bea2d537618462ab3ce0b9c1fdfa1c62d2d348b977569a4d309b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAT2427932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e474fb5bea276e38fac50e83b9781594cdccbdb643e1dd02950f46294e0b0c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAT2427933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a757af09fc87c09f7a042625600687e5d8dc3bfaa58cd11b3ec3923062fd00b. 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/QZWFR2416820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d9fa6f58436ea7cbdc199b0c7604230d324aaca1c090968db476d08c6ff2b. 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/QZFZ42582359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1260e9435bac5640ecf7e8c4a8dabc146e330b1b89c9fef15b3e46b65927c478. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZFZ42582360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb8a5546317a54076dcae6946592b1581c013ae5ac1e6615ba37430ed7bbe2f. 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/QZFZ42582361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd165e21550e810318338a4510d6a1f52117a5ae7f6c3953531530e8bd8dc1cdf. 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/QZFZ42582362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a856bc1f64756bb7d67895e585b1cb5358c8046292d71d088ba9755a26dc646. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZFZ42582363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203765c628c808d016c26d83c140778a68a798b8312c396f225b1230bcde8d7e. 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/QZFZ42582364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3145f34fe0159d6015959c5a5e7a7f950f1c98b2d8fae4e8866b8fdb1c80d4be. 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/QZFZ42582365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9350645a5ea7b2c701fe8482c2fb2e475acf13daabc25e3ae6b53f80d94416. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZFZ42582366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8729228319b50fa3281cf50919fb6ce3a9f6731500ab3afbe6caf393deeb08d9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:24:41Z), 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/QZFZ42582367.