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 0x52a385cc344936ce14e815ea3835492a5c737e5fc98ebe54205c9411ab369896. 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/b249bebe-98a8-4d13-81e6-6b662e31d794.json and https://artists.proofprofile.net/proofs/artist/b249bebe-98a8-4d13-81e6-6b662e31d794.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 0x81290fe11254845f484e5658729e0dfb6c0a9eee64ecab688d09d6127117128c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:04:15Z), 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/QZHN32266152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab53d87cb1ac82858e138afd08509ccc557fee60386d65fad8ae18d039c4c1d8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN82212139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9ff626951861d61fd9fbb864692019f3d0b3e214ae3b627e5992dc95d1dad. 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/QZK6M2234743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b7dc2ae4c501cbc1cd18ca7dd04031906702a19908d052351e43e61944e631. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6G2275918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de998411eec0520edfd6dc6e0a8f66cd9b7e7930ad2fd76a929b10e433ec873. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:20Z), 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/QZMEP2226842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7b3948faa2adbd8f22ecbff1faf5064e416f202eca2c5c2a87b879aa44f61. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMEQ2243759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8b582d2daf48d405901cfaec4a9c1e07db9c32a0032779f58ad4d52055033. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWY2266556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef76256f22ac44257d66f55b8e85a02218d642dd860e48f99b52cf471d1c1c86. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTAT2288694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8cc1beabd8ef81564cb78ceab3803d8438177b6ec69576d64c5d5ef5623e4. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZTAX2294118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5731db72331e6363734ba74e60a6ed807c15d02b5c4ad0f3ed48a06cd004affe. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:57:35Z), 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/QZTB92253881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699d4a983f7c6532328f01d63314f544a2a4700212cc3108d99d4b8d74b5aad. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:59Z), 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/QZFYZ2352802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25022befa41ab777374a994246880795990b1e265dee413b852c182effcb0374. 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/QZHN52362216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5913f43c72915ac2507d4b77e159f308a6f125a014543c47ef684ad0b094716. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:37Z), 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/QZHN52364632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab78cd55752274e07e9a6b87e89d17f7d832cee0a4b539a659a559f25d4659fc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN62335684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe27db52c4dd6b292a4d4eec42e99441932e9d75cb86d8427c6d7c2964e5a836. 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/QZHN72324005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa848014eaff3f20258bf45572fc2d372347891ce8b0d72b987eb7a90bd77fd88. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:28Z), 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/QZDA52388547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a994728acc1ab18804108955073d97df9b2a8ada6619428f59b9df2f269c654. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN52305370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831023a4d7640b1ee604b1000d736c0fbcdf40da102ac180b2fbac92b841a9ea. 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/QZK6L2350657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba257ee778b041cf42ade8fc537166f743c073aa255750012a04a805d60b00f4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6L2350660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9f772bfc10e9eeb596dda1fdaa9022942aa48fe3044a0b51c93e5063c50209. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWV2390593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7765878c9720748a3964abc77807ed8513945ec55046dd551e696723cd8b3904. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:59Z), 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/QZNWV2390595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d324d4bb8a1d635a8ed7c7a3cb035df1f91c5fa65a291e71824a31c118d53. 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/QZNWV2390597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700e2793f5a7b12456017c1cdbab494fcbcb2eb3843a7af58a6e21b1a7b7ee0c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:17Z), 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/QZTAW2366884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf045a6867b299c9563c9682877370b60a064879dc41bb2423eef7cabcfa7790f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:18:09Z), 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/QZTAW2366886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4e6e57e4fd36c473f698c218b12611126b0f04c5004779614a5a9a9a83a7fd. 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/QZTAW2366888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8f2c472e2777675119363282fa7bf6f0cabf45b66a664ae8af88861cc50e00. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZHN32496268.