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 0x295baa76fee7b994ce7d54d02d725f04d582b62776376abe1991211396ea7d1f. 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/323191bd-d7b0-4b35-9870-132341736e41.json and https://artists.proofprofile.net/proofs/artist/323191bd-d7b0-4b35-9870-132341736e41.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 0x4548840831e5cf304f285d9091acb19208b60813084cdde9d06fd17473c9aaed. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:49Z), 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/DEQ121638897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad069833b234aa0304128133610fb4ddb3189558f49378911a7ae11df55f1c2a. 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/DEQ121638900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61252503e78d530b1d0b39c14c33dc6eb54cfb85290018d55ce47ed6c56afb. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/DEQ121638903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6445cb677fcdae736d974c3dac94861fd9e70993555dd64bfeb6ace2d134b3. 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/DEQ121638905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56d7b26db01f5e387fb52562e82710d97319441d74e31f1cb46c66796e39ed3. 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/DEQ121754067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28098f0303e015cf3ee02d44f793ad57f6585a770b69976fa8e0c3efca517255. 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/DEQ021801486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c3cd550ba8b995bbf76dbf1951e6b1d5fdbd01e6fa6e8c32e57dc9359c8548. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEQ021803377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808400ed76ddde29a456ac51be0f6e0803e875ee6fdd12dd72b0c3b06cb06d4b. 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/DGA0M2434374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dc4743974eaf1301cca0a7ea3b1feb2a42b13a72da158b30dfff0d588bd266. 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/CH7812417968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c143390a2b6e8f20a0b78f665d68ae213873914d6e973667532d59b8dbad9c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH7812417973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce281ab2bcecb20423f5b5f4868cf29d2ab6741f3992657a504d9f9f9486837. 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/CH7812421218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02ed6c51c2570288827fed10a202cb9767d2fb3e6990b5379b7a78bb3916ce7. 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/DGA0Q2421290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7f554f97f71d0876de45bd92bf973538ca84564bc86e64997cc9f9f256a7f2. 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/DGA0Q2421291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2172e178252710501b109c65cf62ed6eb861aebf50c023e2d4384e49b2c4ca7a. 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/DGA0Q2421293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e39b50640a8b8b5c83332e1263557e115704582d340a197c4d50bef42f51880. 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/DGA0Q2421295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4e2e3666f21811ed86a3bdf741193c2b6cc0dbd7e5368fc45632a18088963. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:51:22Z), 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/DEOB62500967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde9ec8a33d8b65304376c3bf1894e6a33d933f8954766ad13c2a461bcf2a72. 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/DEOB62500968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadb8fdd3835b8e36bc6bfbf3bfa0fe61db02917b0e85e5a9a068e15308a3c6a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:25:38Z), 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/DEOB62500969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210d5cd8ce3dbca30c231f23660ba24a90d6cebc5fb7a4f2e41ab5c4b44307d. 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/DEOB62500970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00a53e83f247a2d382bb8983d34f0470ce2e65df463e9982a564a08dbaa3ee8. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:40Z), 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/DEOB62500971.
Ninteen Seventy Something - Snares Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa309f25deac431da2e5ec2069fe39c94473bcd99d04299ba14fc53a548012830. 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/DEQ121753130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7308e3b18527280cb4b403390e7cc820e3bf59f4d7a74213d8200761347fdb32. 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/DEQ121855746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb05e8cf381914d3b1876edf10248b058208be0b0f75fb3d0229d834040e650b. 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/QZW9L2490530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7308e3b18527280cb4b403390e7cc820e3bf59f4d7a74213d8200761347fdb32. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEQ121855746.
Ninteen Seventy Something - Snares Remix Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7137211aaf782b592f77cfdd8079e92e2aac7ace99437100a25ae440df21fc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEQ121753158.
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