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 0x22e61cd7778e742935fb73608249c552d7924b9e568b24fd399019db1fd1ab06. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3eaa170-6a33-422a-97ce-fa3105109bc8.json and https://artists.proofprofile.net/proofs/artist/d3eaa170-6a33-422a-97ce-fa3105109bc8.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 0x6d7164487825633acd74e3b1f7e37d59b3144c77f20019256c45251f6eedddcd. 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/QZWDE2245797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8616d8b0358e342ee5f75b338c3557dc7c3e02a6ff1449b9f70810adab1957. 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/QZL432300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5defe32b46eaa1bc9a8b92013d0b0df3b33627cea36e2e9bf91c2cece2d8b168. 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/QZKDT2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05573b9719c25ab727730c0713455db861b6c7363301fbcdacc10413aab2d92a. 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/QZNJX2468202.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92deee27d40cca37fb8f7b63e36f0d0da95cae3f046187ca921267ef3c9bf14b. 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/QZKDT2400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708cd7ceddaf4f3dd7164d53d31e4b6c5a6ce787b08585aff85e71885fef6aa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTLA2464510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea18474fe960fadd99328a4ff4e726b6f7f9cfc5d2215bb06bdf5fd04ef171. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS7J2418134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f386defd714ec3cc9bbafd938ed706cfbed56f4fdccba719ff9722e77508f. 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/QM6MZ2475362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fd30c1a7da2782a1e7a8c658adee0da164f9203d01739fa3149a00580bb70e. 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/QZS7J2491543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72853e960ce18b77bc8d2e07f5b13964591a77cfa786c719774bd8d95b325be. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZS7J2495061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbceb0ebbde6ebfef643d9f18395ea609bcccf08303bc59cd7629ad525437667. 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/QZS7J2352122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9f2b23651224460a1846145c2115c729268a4fdf248978e5808dff6de62d57. 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/QZS7J2355457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b12783ab53ee9257f0b6937dcdd788244a50c876d45651f839f33af19fec29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZSYP2345868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f63a5ac84dad50467f805bba578ea960d1cb4030bd5279d8f069ed1f55f3c4. 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/QZSYP2321685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0267bfc48dd3d291ced51ab3700bd46e137c276f342d311bb3d1f4b17bf5227. 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/QZS7J2362876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750004845b72482187bc9ba1d2ed54515cfd7656ed56a64a4d7ba84815aec83. 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/QZQAY2312902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ecbd07e23394d182e55071af035afdf135f9cf7fdff1ea7d2f308e900cc3e7. 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/QZNJX2367659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d31332fc06cff214183c8e9b481345b45fb83359c024498c2a99e8840c06d96. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJX2343400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce8c6b2fe1ed1ef48606ad636fbf8ae622ebd83c8620e76eb129c310d113f6. 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/QZQAY2347546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99cc15263c684fda7e3009fd3dbfd02ce4b8e1458367ce3ed998037d0b6d212. 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/QM6P42331292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1d20755b70b36b496db3caa8930d51fd06abe76ef6bf0a4232a771d7276d9. 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/QZQAY2331083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb817a0ccc9baf2fe69b8267266fed7ff0d88cefa70f7a3a8ebb2f38318177c0. 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/QM6N22380007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa0cbb1f8c2662d4a1109f5ff237a9339d18a02c2b571b21cdf275c13430d39. 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/QM4TX2361870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d07eb08c61909b1f6ef1027ce26dda2d8463b15cf4a305b61613d107aa043. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZKDT2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa12ac292b290730a22bf7efce1f1243594adc77f15d0b2fa771b0c0ce1037b. 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/QZKDT2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75feb78873fa645acb317d17fe6747eae067c5f60a7dfd9091c71b2e59c8984. 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/QZWDE2248807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f1410fbf2eda02fef5fb34a86c40f49a6f5539224b572fbaa392d1e27bcff. 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/QZNJX2388672.