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 0xcecdc340a24588fe83787c1f24178369980fb3027cbdcae92007a6c871ea6f83. 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/e707e7f6-54ff-49bb-bb13-6cdefce96006.json and https://artists.proofprofile.net/proofs/artist/e707e7f6-54ff-49bb-bb13-6cdefce96006.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 0xb8345823577b8ab1b96021f3276129166838fda951e7f6086ac4dfafd22f2ceb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:44Z), 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/TCJPQ2171758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d01b7e22ab73fa5dad61c218e19f7d398f2ad42b2694580440abb28cc64a811. 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/TCJPQ2171759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc230582a7b152e3c4de5cdcd9b43e24f95fc42f50940a6f7acf400aee2970945. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPQ2171762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76464d5779eaa06b22bf33ac6d35778d36cf99337c56ab07021a2624fee64fa1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:25:21Z), 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/TCJPQ2171763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c8eaee21b291bbe84bc3fd94a9aeb2db14ba1046e915eb8f2e8f655cbe589b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:46Z), 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/TCJPQ2171764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd023fb128e7569fd9feebb912fcf1e47072584d4c0e045ad101beac437a4a505. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:59Z), 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/TCJPQ2171765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b196d4125267a3897c51f19d79ab2a3c30904435a7c395d944a99cbfb577631. 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/TCJPR2235091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a22b593656e9db3cd761a6ece3d41701da52ece2d1d8a94d517cfbf40e6069. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPS2226074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd511c5f5429f1f63c7d955fe374f8874bec5532a8d19a91f53420237002771. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:56Z), 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/TCJPT2253978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0a613aadbb25e08d6a131e48f1be88b094546a61b4bc64b2ee57fb10ae5985. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:46Z), 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/TCJPU2349857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccb10ad35916d75a5ef795ee3a1ae1a47125a7e560ee05d3407e18f10aa1d38. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:49Z), 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/TCJPU2378019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11af43ee710bcee630b3d53b1844f6e977bd427e6e58d480013b4d9054abcaa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:13Z), 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/TCJPU2390067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786408ca349a3fc6f3052a5b56d2f9f8722e16245b2b90b6158b0e6462261b4b. 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/TCJPV2304853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746dcc0fbc2a7f76b508c08edbd21e12bf7bd29ab943988ed848034241f884f. 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/TCJPV2349063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde6c5448b638ee220c4077d9d82da01fda722b05aea8f1f2bdf668b0625e0a3. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCJPX2343470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67409c7fc5c00184a9ae3b9b8559c4bf67bcd22ec7ecd0406b35be040c5f113. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPX2343484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7f8cc955ec96f94368e900432238355924f81083a10e55fd76f87d4da942ec. 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/TCJPX2343491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa868c50aeeca028a0b1c5acf88c9e382126aa1142d68ef0ce74d8a3ca7c8e199. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:05Z), 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/TCJPZ2408632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9dcb79d2a9be7dfc66de34127561babfc0cd3f86d439fd8bb9c825c7d7c6f1. 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/TCJPZ2408637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf4faf30f652507d412c5ec35390d4458211f38edc86e1e168492e751b8a752. 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/TCJPA2434375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ef23b791defe4dad74b4d9c38fb7c4df23937136d12836973afceababa1066. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:34Z), 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/TCJPA2434428.
あんなに一緒だったのにわたしはひとり
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8d41b6a9411a06673257886c41973a577814fe080c17755af9a584ce6bc3f9. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/JPR292400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8679784f8e176e54f0e28964d27b1c6a4665a7f245532def5167781be372bb34. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPR292400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c80f50d49b8eba92942819887a6246e5566df1fb06b982b6285e6688a2974. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPR292400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e00bc65ea799d6dd36f699972469d52f7bf1411b9c47e8875e6bfbbf221aced. 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/JPR292400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231e9686a1c0a89c35c55ddf042bbd44f930c80a8bf09ff0f00e8d7229d8d878. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPB2477829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a54cb6225e36d145eef09ea011cea975999a3d60c05e0b8da6ab83331a816d2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPB2477833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe749c97bcf4c2917a549d5ef491e6c8f095b6dc4ad12ccd14c535ec6fa4c6ba4. 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/TCJPB2477837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60993a12ef07b1247108f3100d8ad4847e7246cc71289ad85efa795ab805087. 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/JPR292400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab12ae3020830942d7c3f1a9a298669e2db90bbd57ba1ab987a6d8d955047c9c. 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/JPR292400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff34d852bf7e1f95ffec421228261c29fca67e03eb7d654ef7827b4a12fadd1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:34:51Z), 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/TCJPD2535977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f76b14fbfe560d16308c62e3cf18cbbeadde7ddb075892506cba2548b08d5d3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPD2535980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5aaf82f261f1780bfd87378ce9e9fb60d21dee93fc1e29f666e399e7e10c2e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPF2598713.