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 0x54abdd781ef80b9071c4e3d5b98d492102331a7858e83da3e45a3544662e5aa4. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f988e373-d65f-42c5-89ea-92dd5983f318.json and https://artists.proofprofile.net/proofs/artist/f988e373-d65f-42c5-89ea-92dd5983f318.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 0xf0d99a961a90fa85d53ffec0fb0008e495709b25f1e3ae819da80cfadd018563. 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/NOBJL9901060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94b6a5c4de3fe752e957bc8b5f1c70b15f0407e93480d4e787d0e15aaf2c3b1. 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/NOBJL9901070.
Blåsen nu alla - Fredmans Epistel N:o 25
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac337d6c7ff63f37e94a3e5ea6cb2fbd1c8f4336a5b9eb1186a88d4ebde123a. 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/NOBJL9901080.
Vila vid denna källa - Fredmans Epistel N:o 82
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60304b7a058c1aa0ee5b94cdd7a7434fbc3f0cc79553899cdaa1259b9b06e5. 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/NOBJL9901130.
Drick ur dit glas - Fredmans Epistel N:o 30
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71212aacbf58da5b3f179f6609c15738e8db439fde01b1e5df40b03704f1206. 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/NOBJL9901150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd6eaa5f425c0dbb78bf1e4c7f11233438b6d15dfd21387c0696c76a4c96893. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NOBJL9901010.
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
Fram med basfiolen - Fredmans Epistel N:o 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1994c1e8d3131e59bd6d370290d7f1b0b906aaa7263b2939a19d12c1566cf887. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NOBJL9901020.
Glimmande nymf - Fredmans Epistel N:o 72
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76108b28d45851f3bf227c443aabd1db36bc5e7c2dd39b545c126b0750d4e9d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NOBJL9901100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab308121b20f95965050d1f5bd10ab96bde361a2c96e7370b313ef29513bc0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NOBJL9901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238beaf44ac957faa6c0699518da1d24d49c45569f2fef60ef5f6d0852e61410. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NOBJL9901140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540b1dce204615dd0b89cb5daccb230cdb3d12d9074dbe90f191b77ac5e80b04. 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/NOBJL9501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be6687f6392f6995e311948be8c1c2070d3c4b20fe6f2acd29993964f65d8f6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NOBJL9501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8785c482e25f5c537319ab55cc6f5cb70b79dc4529477651aa47d5527e4ab. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NOBJL9501030.
Øl-rapsodi over en samling norske viser til pilsens pris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb76e2aa4f86e5a2c100a9bf915dfa0641fbb625cfcc53b7fa411691946b2645. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NOBJL9501040.