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 0xedd5376070197f2c1a0f7a43be7abd3c0dd9afc3708253303ee1119fe71ba4d5. 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/f77480fa-3f04-4450-9bbd-40f00d72b9b6.json and https://artists.proofprofile.net/proofs/artist/f77480fa-3f04-4450-9bbd-40f00d72b9b6.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 0x6b72cf1c8f2927dcb4108793b4dc8a89254a2c077a8f348bd7fb23cc8979d8e0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZPJ32375253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d152894450f5950e01cb0751ac70fcd0f723d397562a0efa51cfcb8d0ec693. 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/CAENV2390316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b1373e6fd1c5cdcc7f992dfe36cb8b6cf736793532f0c05303d2adc4bd0aa4. 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/CAENV2390337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e320b5d6e2160b150733f39a345ad07fc4a0e5137f497eb6f810a4bd6fb57c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CAENV2329039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4637ca870b75c3c4ad36110705c21ae8219d5da8c0e16d8a53d160800b65912f. 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/SE62M2239152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea8cd0207ca32ff9f8ca9cca0dc01fa51299f720b87f69c40a7467805e493b5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAHQJ2284996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ce6ce9ee8b18fcba010beba97111a91fe8a0dc5711047c1b2530a2a63fb5c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAHQJ2251761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6038a9c8e416371bcedb1ddcd900ab24bfcf719f4ab7960482fb20a79052562c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CAHQJ2209124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745f8597da068d9ce69a96c55c101fb81877e7d230415c93853270bf791c3f5e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CACWV2239394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3c0d6aecd51d31a9169434ab56c1f6954812144f71327337fd89b05a0982e8. 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/QZPJ32139157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7add9de685e5021ee55197edad4dee8ddc169cf8a3ba0f98e9e05bfb284f2406. 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/QZPJ32133012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bdab8e80c378c81d00e853996a20f9fe6d78170062e026d9be03dd390c2119. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CAGOO2181851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2136f6209a528a74a523d41449e52825b15847a56a8d25e1f2cc763dbe6a734e. 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/CAHQJ2191510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7c95fe8b15a779038f37a211fbbcb5be62803d8aa0bfb13eb306d5a8470ea. 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/CAHQJ2107656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b5a29e419c2e701269771bf8f043ea807eff1246b30ce594134a4c727fb659. 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/QZGWX2059291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0074eb7145369cf376ba0920495ce95642ac20edf79fd4c5693002fa5854812a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZGWX2038256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3600d4eb5029fdeffafe74231ed750780d5e3131e6aaae2c0a3b915b8c37c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZGWX2013642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7311a9b37dd6cf105b1c1a85ee16d7bf32314136cf8beef8fc5c8d307f88b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGWW2122692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aaae46ac8560b72264eb296375bdce94934304e953ee58b406b2ed019b151f. 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/QZGWW2108614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6472a2e54cff022d03fae46360f0e923754a4d92d43297990fb2d6e8b03115aa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CAENV2013324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5746514a19054c104e4378c8e256ea95ff10e360d8a41d0b238afbc3116b5046. 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/QZGWW2091043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358984c0a13fda8bbe066b9cc6c89c3e8b8c4cec09b2d5d9b8e69661ce969807. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/CACWV2074525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec8daf30423ce0ac93837564558e95cdf55b2a867bb337169c71a8d4cba792a. 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/CACWV2019257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba52deb00a87fc36f966b399401cc2f2e1b2e202c27bab3f51101ae85ccd3305. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZGWW2054852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef25bb0a7f5e4b9a761d04ea63cb8230f8703de2ef387d3005e05561a10d01c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGWW2042958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb946f2738b2a743a6069cbe71e7a1ed77000184ec23d7a2ec14be4c77f5a58bf. 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/CALVP2050954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdc44add9bc3c2ecfe8f106d20fb2ad579b01c7f79cd39b1f411d58fb8b7e11. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZGWW2018805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73e18f189c7719e4a3be5882cd9602ea91650de4961ce7df09790159347dcf7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CALVP2014338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f0fb55646c96cc7d574e3bb80e07d1ae13816baa85b91d72113ab5f6713b2f. 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/CALVP1957151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fc04a51a93c1ec3782ea64dcdb78dd7a2ff171981f9cfd7dab0968b67d465c. 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/QZGWW2014955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0626d56adbe87808f3e1ba13cb319fe56c74ba2492ece75d92a27c445b3411c7. 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/QZGWW2004636.
Waiting On The World To Change / 10,000 Hours
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2735fefed6063e663227853e5568844d24b3e9353da3d74df29b99a29ffc5efe. 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/QZGWW1997491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061dd74e3f0e30ca7786235c4efee542105f5dbff59c8e430e12da1bd08dbe61. 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/QZGWW1986146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ba568bcd36ac6ead00b45fd0daf9af09631da6c9bccd7566a1153d9c40c34. 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/QZGWW1945101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cf348677acbc24dacb14585727e63c9effd29bb0d56e28fd49dc5a07fbcfdc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAGOO1932862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f2e81a1a297df34b56fef72a43a1da4739b5b494c271b5605e433d9918a577. 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/CAENV1993709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc99517f5db93027d9a3648c2eb6e2d369acd657ae114504ad5e489f15bc81a6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZGWW1908191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bb1c535306d465e4760265ee4ac736965b83aa00c0aeb013db92b3c9152997. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CAENV1972860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6dc93c33a646739db0b9a1a08554fd94ad0de46a49242c24efd24e094ecbad. 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/QZ22B2079396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13351e0c8084b4e9693baecd129bc98b232ebe9cd9398ae38f79cfa2778439b9. 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/QZ22B2053011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1677c8ed4f7ca9459fb5788595f9cc177f7d597bb6689cdf98b82eecbd4ef78a. 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/QZ22B1912655.