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 0x580b8859d261f28826d4e5b6512cb9b0ca87263eae17f27d193c4ce69ef451fc. 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/6bdb9289-2534-4487-923a-3a934937f7c3.json and https://artists.proofprofile.net/proofs/artist/6bdb9289-2534-4487-923a-3a934937f7c3.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 0x9d54d4bd37449f145d1f2b4eda3cde4eece2fb2985f2bc5f962f553318e57aa9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHN52003401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ee62a2d1da77324de43403b659c647ba4770be56b58b5bd72d549050611d11. Chain 2 (Bitcoin): anchored in block 957794 (2026-07-13T03:10:12Z), 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/QZHN52003406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e2246eca0156397bbb02996870ccb77bc1660ad53941216c0b794c55e1697. 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/QZHN52003408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43795e6cfeb77bb589ceaef55b8a030b437decafcb01bb2471ca0286db579d6f. 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/QZHN52003402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ab7f047fccb2d15fb437ecfa21bf6445eb3ed335edeba18bde07124df931d7. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZHN72165514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983bc49e726b2d497864351f1c512d1a2aaa6365d78e9ed3571b0632e42583d. 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/QZRP52105985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26bd8f699a0c9ac3d2030fb8e56983a7271a983348b56c2755ae400e1620b9. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZHNA2220745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50bc360dc8664ab70afa7bd5585f273aeffac5c4217b12b6fb64c312b000ac8. 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/QZNWT2246775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56b2b5f77aab74475ee480878037929843c8bde496c483954b095faa9a44edc. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZNWZ2228172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b74b576150680b5dfe6743504a5eb15027a03bd7f1b099102afd6d35fcce287. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZDA52357872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3e409681336ae12f7af57af61eddaab95cb94442df71cb7aada801f095661e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA82397320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d20c1c1848f098e1438feef31ee6078c53b5ce3e47769f8d0d579a8c3cf00d. 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/QZES62362928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa97d9060e218fe2da2efd59b3a28c24731fb7c3cfb6bd0b9cc58ffac8e7447. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2343618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cb36440a5d1b5a72194d9c41f1296d6969ed70b44b26b254a212807d3f07ae. 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/QZK6N2396476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491bd136692a69e654620f3f98825e71db7fa22cd7b41a7ade2b78433beef373. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6J2330257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c4c09d98a2cf763718ab2beb17fcd065a0fac735f0efea3c94eff1e97fb690. 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/QZNWZ2385102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c09b12f35c676a2451a49722e6b551dc7ebf08c1a5c8b6cbe952de4336ea31. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZTB22347234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65f2b28716ebb1203a1b2bc06fd6cfb6c93344cff3fecf67d2aad25502a503. 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/QZTB72303018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b826611b107d5fdc79ea9395f55c99be46a3695d965d9290f959e0b2f3f3db1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTB92381588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34688315ba49084289efd7d3d8a4bfd811bcac2eeac90ab1fb4dddb75443dd25. 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/QZWFH2347065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c85931e4485a2f813f4a0a8d3d78c058bd0585a5c91a1ce230d86950365ffde. 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/QZWFN2319796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb122d956e2639ad1706e626d7e20118037250b60919a07564688cd02c5e13. 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/QZDA52494890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc18463d2c4c42bc8391cce0304538d304a0552ae906ed9d2f54d3d9dfac7fa0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6N2463514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058b2b49be0bf03fb9339b1e48a260e55640dce602c52b18831bbb2f59083f6f. 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/QZNWX2405814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dcf79401aa815661654d7f04a11123b52beda3dc2288cb63dc7944cd34a9a1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTAY2475037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf775a6392827727ea7d4cc66169d7fb8650da74c7cd7bb2ebf5561324c0de26c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZTBA2473054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1221f9b53198ad8a6e2a433b3a045c3e550b4851a3bad096a533522b4b957. 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/QZWFV2484429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0cdb88b07a1642b0141dde0f7cca8f862171c3814d60bb1f858c2ea1a1228f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ7W2426071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf5adbc662444cfb7fd4764274eee5d118631ec86c1b3f6bac68fdb0f156970. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/AEUM72500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc466475b10b651cba4567b8594d160af8341fc0e19444db831b5384944aec5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/AEUM72500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489759f4d60f9d63648bf314385c4ab59fccb6fcec8bae02d79d68d2f950fc5d. 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/AEUM72500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79277830de62b7fdfdc1557558ee88d8248cd8f0321b867b1a8337d04a374bb6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AEUM72500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c827310664fa1007de293f796fcc498cfb273bde3d6f24367efc2e1779d6b18. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/AEUM72500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0492ccb764a2bf44bef77fca729dbd93bd25224fb442508d90f7ddb45dfbc954. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/AEUM72500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782fc65616851c9c0a926c8c1ceb4f13cd84ac8ee424f1cbfb83cbcb566ddb5d. 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/AEUM72500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0002515d68b7626e2981e29c7409bb3494b5cb115881a4dca0150613de648003. 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/AEUM72500069.