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 0xa4b50efb58220e6267deb219d475175e048b5cdd4b3912c7a850ac2814a5feec. 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/838f0332-0953-46f6-a861-99efd7fec460.json and https://artists.proofprofile.net/proofs/artist/838f0332-0953-46f6-a861-99efd7fec460.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 0xc3c4b08e0b7d3fd910b572fe4f3d71d2d6a8e76470413bea29a97208f51fa68e. 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/SEVLE0200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9656415feb7fbacb998846f08c7b9d30ee5cbbacb58617863f0d6bf37103806a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SEVLE0200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d384090b429a3bcaf2a3004b002c45d38141f1aa0615b807b7878e52795a658. 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/SEYOK1200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bc16f72454bdef8c6a8dbd8efa5cbe6d860852f434e537ec0ca70c797cc8c0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SEYOK1200159.
Upp med garden (feat. AFC & Sam-E of Medina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba68f0e42334e4bf065b9892e57c88050d6a4fd4f78f1bc71d34c11a2e33318. 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/SEYOK1200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa520034789ba06f63faff2495f19aec35ac99a0c854891617b7dd4a762d9af. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SEYOK1200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90deb61a089bc83b223fbdc34e3aa084a5222dc443ce0a8cecc46595de7e18a2. 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/SEYOK1129544.
Till Världens Ände (feat. Robert Athill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4601859ddd8d1a8d12eea6a7585cabd0f1b01cf42b88b981a2afd062ed949f. 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/SEYOK1129545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f8ac1f9a9a9a554b9bbe7babb1188eaa39da2199a713a67fb56022d856fbe9. 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/SEYOK1129546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f217c44ea31c45d1970d3f316a1359426c9305c91a32fa7fbb5b4e195f2765. 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/SEYOK1129548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6d2968b555b2bf2572ed908a76eed42fe7b32d70143be6eb83c5cacedc4652. 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/SEYOK1129549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c9e253abe405c45fa85d2a2bf7ff2c731cfdedcf4d2707c54e3be85156e6a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1129551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc47bbefd87808587824a9b68b84594e8c4a7c3044bb0dba6152be28829284e. 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/SEYOK1129552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971372fb2690705ae2b3df9eaec592148170f5e702f8e349bf21300c3462f8d2. 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/SEYOK1129553.
Tills vi hittar det vi söker (feat. Robert Athill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0642872e707b3e897fa63f27b31cef1f4f23ae4613de16f01ff0987cacf8097. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1129554.
Riktigt snack (feat. Alpis, Nimo, Näääk, TieHit & Nadamas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb7d5b6157ae65c59e82fc844b4cf27498d23be2e5e7617fb83d1076366fdd2. 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/SEYOK1129555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d56a6d957d89a4230fbacb12d993fd001ab9fa2050a400405ae56d62ece0ec. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEYOK1129547.
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 0xf1e9036b79c0c30a3b7b0f6f9176e86bdca07e6edaff98c8e117876250db7344. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SEYOK1129550.