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 0xc69b215666cf9401822a8db1313566f15466fea94a741d43383fa1d3c6bfac42. 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/713ec251-fc76-4bdf-8b21-dac6a73f7f86.json and https://artists.proofprofile.net/proofs/artist/713ec251-fc76-4bdf-8b21-dac6a73f7f86.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 0xe4460efddb38b58c97674fe536e8b90184ebc9790614795e41c85d165362116b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:31Z), 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/QZFYX1959343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07bfa1ff28e2615fd72f7beb739c3219ddecfe0a3e88f5636d9e7f6e03eafc4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6P1987711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a42768c7e55210fd7d55660cd885c021a262f124d308606ff342792bf386411. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/UK6822006502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d977d7197e4e6beeb33335adb888e91d4a8e9e4dfd5323ec3e5221b3476071. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:59Z), 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/QZTGW2100840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0568bc19b43cc7f6e50d45268bab0ef56ee349a49b43c3f78a47155fefce857f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CA5KR2189826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b91362539824adec07e4780263fa24721c9e0073b2b0b8bf6b9dd39d93fb9. 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/CA5KR2199976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f210ae7201895fb175953727567d71bc617bd0874e48eb739949b41f513cb69. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTGW2100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974ee4f066c531c0e65a83da6d06d07674e46d07e703ee5361bd7f7c5e327cb6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:01Z), 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/CA5KR2227463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e66551f7b0ef41caa131383a3280811ef92efd2f7d250779dd880bad7b8920. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2243930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395761eb8c5f549baeb4d2b57e2846d69b1ce536c11e88ca0aadfbef654b9b2. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:07:57Z), 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/CA5KR2250484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe74554c12dbf3bd8694d3a6e776cc77d2d558955a019f1d83a3d72ab547b13. 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/QZHN42339479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d7c96e29d24d9c7230863d01986ade422ffefe43e1f3d091f2f93de4b4a01a. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZMEQ2400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf906f3a6836d32e804d6caaa1d8e957451a01112ee83faebb6a9f76f18214b45. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:06:31Z), 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/QZMEP2462261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330db9c703772b89dd469aeaca338cf1ed09fdfed98b1dc88ad6251da0a9c004. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:16:41Z), 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/QZNWZ2442407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb184e620547044ec6eba427afc9cd06fb524b7b4921eb76c5d6a8eb8edee0ed4. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTBC2431589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1206224b632594560ddcf41a9958a42cce19eb44cea5587aa934ca437155bb. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZHCR2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f29a1c1e498745d70071c202a076537916c12b7b12ed85f218a9a92a206b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2014087.