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 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 0xa97703a33ac42d3ef3fe710b17e44e01493aa4c1477c13837765bf7cc4a2ca5c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ec4a62a-4d08-4cf4-b9be-800f50d18787.json and https://artists.proofprofile.net/proofs/artist/4ec4a62a-4d08-4cf4-b9be-800f50d18787.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 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 0x8ca18f57fc12cf5a30f2c96a0005708d6ab1fe95561914de7a094197d5f809ca. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SEXKK0900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b02fa7efd5b402241a21a916fef70eb64e1a2c94769107e800b0ff8f9dbf685. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEXKK1100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96906bd1b5264204a45a72a79c6755fee57b62cfb08c3601a2e1f9f76d8d7ad8. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/SEBGA1700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c479aa518f1de10c9c9eff61aac3c80cb3578d6b8c1175181ef9b1bb5820684. 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/SEBGA2400978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a6cd15ef587008fc5f0892af107588628e593a37c211b4b95eee733da2000. 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/SEBGA2400696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79c8b3609ccce00039f0af2e1064cf6b35bc7e7ccac70df246d8b05567d1cb3. 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/SEBGA2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e147bd6738546a3fe7763876dfadd88ef2c43a7690483f9c6ba4cd24d9690. 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/SEBGA2400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaff16106eb8710dd52608b2ab78ba34dc61f667cb198b0ec1fee46761206a4. 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/SEBGA2401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc10f1c8d623b3531c029e2c02bf428d2b7fa69ce4af09288883d018a6bb77. 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/SEBGA2401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49cd251128c4d6d392b20df022bbd59a087df05fc52ddbf7c1ea29afd858eef. 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/SEBGA2401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cdd4a7f97c9be18b7284c67b25f0e55e9ebfc4062c7cf6e5d5b6c8b9ec4117. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SEBGA2401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c479aa518f1de10c9c9eff61aac3c80cb3578d6b8c1175181ef9b1bb5820684. 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/SEBGA2400978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79ffc7b591723675f51a0af5ed6b1ea7ce800fd28b426a13beed451ce43c6c. 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/SEBGA2401308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ecb3a0af29c96d1174004ed18317eb644fb0767370ca1d5f5b53cab74a10f1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SEBGA2401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3e5ee07ffbc4f555efbd4ab70f2ce7fe884d596f032c4ef2cd27b49e3e0201. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SEBGA2401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7e09e41dd6a984e643d8b77f724c32dd043c811c63251d07abb5aed15d7c91. 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/SEBGA2401186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd2d34b327b4c030a3a59c1be71a1e59d5bb0d5c4a2950ad4b8a6ad5a32e554. 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/SEBGA2401311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d0e1535aa64ec81cfb4e4aac5cc610aca5a26340a64c45ec49a494c299997. 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/SE7EV2300011.
15 År (feat. Alexis Weak & Jonas Lundqvist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b86ef668757ac6e78a92a15c5952f4fe5ced8248343d30c003417a29a6abfc. 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/SEXZC1100807.