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 0x0997bb28b5793424f21251530f1b24b9320711b723a906fbfb14d13375b775a4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53daa12c-1e80-4a8a-bd9f-469e71d8823d.json and https://artists.proofprofile.net/proofs/artist/53daa12c-1e80-4a8a-bd9f-469e71d8823d.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 0x9ad836cecff18590644bb3fc86b2b4f157a982feb8bfb015539b58d3d340c187. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:40Z), 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/QZ9JZ1753897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7f981c48f02f6547ea5534ada74332eb14ad7527661ca51eaa002e675678c5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZCE61849541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233970d4e1eb16d98f309a97317304c2c500851890555381e6ec4e3502e25ba4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:05Z), 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/QZDA51879925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4e80c343197b6a4f0024a2c12c6be6e6943ff8cec1085bfddf39228b0fe13d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:31Z), 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/QZDA61889967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ac3b2ac0333ff4acbf5c47d6ea1fc19b1127a3f8ad7b8e999bdf4c5281aed. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMPKX1892116.
United States of Smash (My Hero Academia Rap)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eb4a41bd00dfdf22b52d81eb9200c4b7269ca9933cbecdf30e6cdde7c1a722. 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/QZES61814875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aacb0a58a22d0ea573e41ab452dc95d14e44a74476d0274cf97ec1d070e4f33. 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/QZES91854474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a1f8beb4e21c7133b7529ccd7e64ddfcff0ad3ab696c780421e03c2c57f4f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX1913000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a994bc666537823458c46eeb08c6a45f39fbdb06e352cb970cf3b26406e5e3e. 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/QZFZ21939313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe64e36a1b416a9560e857b95846d56230a38e0d2c4d889f3e7465f19380307. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:28Z), 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/QZHN31978349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c74b27fef504564feb918e99a13045bbeb47f9c83a01f8fcd132b15fda71c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN41938113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219a26b401787154bf709a4c8619627d09f55de904b9d8fb05506fe023fcc0c5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN81934303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ff094f66d6a42417bfc39f4d41345ec7f4d583b1a0741c151dfb6b9b7e67a5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN91985049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18047de5abbbae95f253ffb482d5688aec8d7a29ab649485ddc8dcd0c60bb2b5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZK6Q1996606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359ff830f7202d721bcd39f64b339b93f7eb438d4bae9207e8061b35e68ab7eb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZFYY2040204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff20cffa1aa574476c30662aaa6ad2fb0e288aba0fc77a219612ba1405a36e. 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/QZFZ22032123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0ef2da9f0e08bfa2439863af02856ccc39a9dbcd1baa5de4964d4d47104f9f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ42078682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45ca6304efdcbcf11e2b761af5d28a8f127adf70bfc0d20d0be40a32ee85aa6. 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/QZFZ62049047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b949866667d18e7ce5f37919c1f64bb6adbeed6291064ff1fc5bf4843a099. 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/QZDA82011575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c4283c098bb74d771090a06f6ddde728bb9f5db0a924cf98bb6d7095daf081. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:27:44Z), 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/QZES52023888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a54ed91c2de7be99cd34a9d8d708da9102f17db37fe91ae82d3ff57f8d306e. 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/QZHN62013667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b10eb984f5f646c337e47fc1037621f6418b949630c5dc48621027fb8ecaf. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:55Z), 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/QZHNA2031121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301eaa4859c911a587118da5895fa3c7f03b65587cfbf5f9882cc422ec72eed6. 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/QZHNB2024306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb518f3e8a56c81b467c4843a0fff83763d019c2dc16f1d259e7cb522cfd9e003. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNC2033494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa916e6687fbeca49dc8bbd498f45a9f987fad47fc891407d87113009f09c3c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA42122762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fb6ef6cfce863012e4967b7e97ac7a12cd3f2b2cfbc787952d4d9a00764585. 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/QZHNB2147832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa042d5d33f36db2360d4d8f810b797992d852b092142233bb941bce403ae3e6a. 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/QZK6P2254785.