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 0x3ba44ec6721e1ee19547bb74804f924a58849b892e51bebd3844044607649fc6. 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/8ea1bf8f-9d57-4a8c-94ee-6f1dfbe2f386.json and https://artists.proofprofile.net/proofs/artist/8ea1bf8f-9d57-4a8c-94ee-6f1dfbe2f386.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
November 16, 2000 The Day Houston Died (Chopped & Screwed)
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 0xfe91e238165e8f0d20ab58c1a673046d98d6a22e16897764fd4a15cca3774df9. 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/USXQS1410310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3093ad6495d1573d3a21406c7ec5a24e154a606a1301cb1af3034d07d5c65db. 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/USXQS1410312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d457449b278b6d698471f7b947da377284ec67e2f9938836024295c41d8b6df. 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/USXQS1410313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcc04980f5f0011d305823cb891689cd358ade6947157986cc1d0a0513ab157. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USXQS1410316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78598ad4bb52e0e8af0b5060fba35616463fdc12047a230b71897bb76679ed5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USXQS1410318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ad075f4d6e2ed20af600a867d21b81eec89c28b30829a32ea870f1735c58a0. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USXQS1410320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa214e1915495e7b44e7751bba5f401f884e3e05e377ca62dac65dc26dba18bcb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USXQS1410321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e79cbfdd420bf480e8d9562694926c91d9c1c6a2cc9492f35f9842f5e20bb0. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USXQS1410323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1dd7bf7b52a6330c13451dc5ff7b95d82ca09ffa15dba8446d709ad0677263. 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/USXQS1410283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c57493fb53ae016f286e017e646cd12c9cc62db5b639ff7ead2acee9573bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USXQS1410284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f1a79a120f24d9f0df76960be31b3316909330e343488e7bd37063bd47d3e7. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USXQS1410285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35592fe1186ae99d0d1d48919026222515366c4605787363bc443061eab8c4ca. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:35Z), 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/USXQS1410286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b105c0314c023572e63da2cad4b6e2040134e37519fdcfdc3a4f2c6902aa0. 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/USXQS1410294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a89b6e4a2961af34b6041ba4b8a136b2182a455966574384350a35bf3bbc5f. 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/USXQS1410295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc5a94b2ed4bc0e8ed4d6f8f10e94bd4f56effe00d9d6dff9cdaf84ad08f32c. 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/USXQS1410274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c66de5d2e05b08636f57f91ad8da760e4f9bf6d2323f1881f2f59927f4950. 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/USXQS1410275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bd8d38abb6790b144930267cb2c876c8e822feb478b758c57109a517420c72. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USXQS1410277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aeab5ecd9ddb588cced59d00fd745339b32bf7ccf2355ff20b57c9c1bc1580. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:30Z), 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/USXQS1410278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ab34a1edfeb1884528b9dfaf77e816ac46a56a7b371733fe1a99b3f96fb44. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/USXQS1410279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb061f21f7420d8f6895717bc61c38eff8c343327b8c5437a0ce17105aa50477. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USXQS1410281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a19d52fbdac39dd039d10b89894404196b88aa742f1529ef42538154d1f0f37. 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/USXQS1410257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ce436c4687519fa7829b99990b6ad01eb9a20fcaa23aa3fdc5b18733407a9d. 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/USXQS1410258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd437aa8d6043f7a3b86138306f6a8beb5c094056fdd9784b8a8e00565e1bbc6. 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/USXQS1410260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2d148f5d4abd7959b23c7c95eae7a73ff4362ed57e2239eb4a1060dd965432. 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/USXQS1410261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191bbd7c47958b4949f5272d2ceedca11f2601076abf6616d0db1d0194d871f. 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/USXQS1410263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7e2fd4826bf6bfb7d25e26947abe7d92779a36e6c2bdc18fa9a5116e9d726a. 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/USXQS1410264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1400f5ff5d02ae1c2d1fd956c770efe1767ac3644a272a63b6cedab404d6eccc. 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/USXQS1410236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb8a889f823b949672c3507ee51806c281611254391b292222be724dc6f7605. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:11:26Z), 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/USXQS1410238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf171a351721cd5dfd05e3848d97611c97aa54b5ff64149373719e1a94bfce9a4. 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/USXQS1410239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b443304864c523503266587a97800ecf109d6a8c2de784fd9beb9701f2c71e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USXQS1410241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83d3c4833dc85551a5e7a17d77a6a2c58501082eeb5ec7d8eae4323c937328b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USXQS1410299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd458c35fca894dbd1376251b66a4b711498084f38bbe45d7b035662cdf45d3bb. 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/USXQS1410304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcebf17a3036a666ff56d8b621bd3e8c95e258f55ad0a71b8ed8ad5a7d801da. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/USXQS1410307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda98f1a691a90a27952c7f0a53da6cc28b8c0de19e630ad1fc51403839e62be. 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/USXQS1410245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6de1a2dcfb04ecb1aed2c286f8a87a26a243903430dbccbb809df1a6c29df. 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/USXQS1410249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529823059b857a749dc5bc882736e74bb5103a34b32e1a00d364bad786efe0d3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USXQS1410250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7430bc8853154a63fb17971ebd727c1da40724ea9179f77d89b16f83521135f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USXQS1410255.