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 0xadba8c22daa9542d8653b3c8553cc458358a15a27cca6ab617396765bfb101b0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/369be94e-3b2f-4aca-bf70-5a6eb8dcd21d.json and https://artists.proofprofile.net/proofs/artist/369be94e-3b2f-4aca-bf70-5a6eb8dcd21d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carolinae Female Choir & Ulrika Emanuelsson
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 0x987f0f09127aed196e7a29b4cf8ed56f0111b3ecfcf73206e7b28d23efe8ae6e. 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/SE3S40900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6f56235a3dab71834be0593c246fdbc8a789e1bafd07242912f109478de2b7. 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/SE3S40900101.
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 0xc35cd2855ed4d5e6b28e499bd9a348e329a8ba3da7ed7af465feb069821fa4eb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE3S40900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a00ffe73c025a120838dd2b5f98d14ee8b311e15b83cecf21277acc7bd63a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE3S40900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20323cfb258fdf8abf2569ebf266f0d927213ced528534b6027108ca83e9a99. 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/SEXNW1900106.
Aftonport till evigheten: No. 3, Aftonport till evigheten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a13c1dd4c31d72d6de3b63cb8727e15c78f36d4a14a719b6de87ec85b76f73. 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/SEVWU2411703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10f18ce55d5dfe5926287651316e36ea05bd759ccd508d2194d1b8751692760. 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/SEVWU1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a6e7b6683d42a8f8a969f153fc0c240dc94f6c1d5b0cc6d8870b9288a9ac7. 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/SEVWU1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b23430d230ce96ae4b7b8b81fb94c994a315b6a11386ebb799745b1fdbd7a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVWU1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23924185c112eaf93ef8c4829c8c770d7aae88e2e8ea77f71fe4b342816dd2c8. 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/SEVWU1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2afea96325380dd4118584e99e90e8fc89ba3a9608334049d071b2b7aebe96. 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/SEVWU1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe5ac36c5dff8427e61bae68704fc44488fa339f1eb3086470955049f6b6dca. 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/SEVWU1500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec93ec38da5e0b52572c4f5bc4077fc81add66f3c39298c78bcf4a3d237e8e2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEVWU1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c5a48229e277f5dfa53e6c1e0cdf215201fbe8ed83924f9dd4b560394adbd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVWU1500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300258f0a6d01c1356632969bb0fa3452735592a8b41c58f9fdb8b47c540f428. 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/SEVWU1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd31dd6b6c47634c7b909ee644b71e8ab888b2132c92ce8df1fb51e7867db6. 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/QM6P41532982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c95589db3ca3c727291436d3b366af167d67b528a8a8905acce96156ff80814. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE4011400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c284d2cca058f54623b467f173bab653297bf0253cecfaaffdd0848d3b302. 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/SE3S41500113.