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 0x20b6132083bde666bdca90d08af29f997f251d2d3d96d89fd26b47a6ac14194e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1c18a6-aeba-4c62-a3ef-fa6f7bf0977c.json and https://artists.proofprofile.net/proofs/artist/8f1c18a6-aeba-4c62-a3ef-fa6f7bf0977c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Göteborgs Musikhögskolas Kammarkör - Inbjudan (Invitation)
Gothenburg University School of Music Chamber Choir
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 0xe0c3bf48002c66fb87e2dc859a24b98110c454a95f5b44717272b6a4db03781c. 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/SEVOZ1153301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647315bb7acc4a74b08cd4fc6956f3e73240c0a914557fcf2a3552c888e52b9. 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/SEVOZ1153303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2ace8045c4e4b7bf35a422d9bc237199ef860807f3cade5ce65d6e943607f3. 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/SEVOZ1153304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0849b3d1eb00397cb2715e899019f35453ebdb9e6dd772cc76e830f00cef84b. 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/SEVOZ1153305.
Ge mig en dag (Osterlenvisan) (arr. G. Eriksson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8bcf534d26cc106f6b645cb03c96ace57d5fe5902ba203e42f675fa1c0eff3. 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/SEVOZ1153306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befc238fe3d01262f4d3662e0cb4ea0b852edd3802cd8238167b57a9991012f. 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/SEVOZ1153308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1cac1158c03fd0aa123afc0cb4fb347045326e8c85b7e2fa41d574c3b9c721. 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/SEVOZ1153310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66d445412eb665c7576edebdcb2e0e73d65c8a3f5c96e3e333cca52c65b37ec. 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/SEVOZ1153311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aff35148de953949595bd0ba7bb62b228d696ce15cb7a1f984354be2f78eb6. 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/SEVOZ1153312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b846c2ee45328af3986a304b2dd00c6c7dd3a431317b572803378100ecff4d. 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/SEVOZ1153313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78867dc949acfbf2990e154f6da5c427ef0531e0d3785d5a5f38fd0ea3646200. 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/SEVOZ1153314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3b827a38a67b5abb6f00fab1e646ba5e7cd87e367d08b4cacfbf09ddae1bb5. 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/SEVOZ1153315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cbf938fea59a9b5b2eb479bd555acce7391704476d7cf0f30596a08700cc7f. 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/SEVOZ1153316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a441a71ec2007ab463ab6353eaad7d284188f1e07295e6b1f3927a7774a5d68. 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/SEVOZ1153317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46833627ebdef23a44aefd03339aac9f92173a2188c9fc1faf2da885492a8f3d. 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/SEVOZ1153318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cfb341a820704f2116b2da7bf2087bcfdc8340b85eddd3dc25bbe70d57827. 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/SEVOZ1153319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f5982163f6dfb032a1fafe3daec8717b08a213bacfc064815992655cd26c54. 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/QMDA62178574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1760fbb47315a8ce3ad3cc435e5f3760b25071b7f7034e3e2eb9748852e04f2. 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/SEPXS9805170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ca50f3ec27f4f8b02ef36be31bd40b302ebec759c4a280c195b5627194ad59. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEVNP0300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0681105b9d3357748a4c76e630c7e769e8dae1a72b9904675e2de53c29ff174. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEVNP0300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833c2b640f77dc8d90917d5e1766dd0d00a49e0d7d40338cc1a0fc493cb77ca. 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/SEVNP0300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ba27e4e4023a00d9a4462353ee64d9c28557a0b17c22d1ae9bf92e023d975. 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/SEVNP0300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56a11cd0971ae7664136ebd5e1157dd2ef6e2557e3c6e326486a695499868d6. 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/SEVNP0300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de3c1eb5763a0d4a5e6bfae084dc6b4f70fc9efcfd9352512aadbee38deed02. 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/SEVNP0300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d985cf0a089ccb671db1aa5f3d7de9b1adcbcbab2af36522177de67f07978f. 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/SEVNP0300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289326e56a3706200d67c4e2179b43b738f61997b194c2e14946c0fc1d1a532c. 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/SEVNP0300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c747c952d340d95eac7ea62e16b1df66dddfee39c0001cae72f97559e5f809. 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/SEVNP0300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d474f376ee33e62c927c4ea8e50913ffce584ead96818afd254cdca7b18ad3a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEVNP0300104.
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 0xcfe65f5d23fdd827082b0b63d05d85bbe6ce2cfaadde2b0d42184638f96e35fc. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/SEVNP0300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4659cf10f0ee2621d580bd52f83b9dbf00ac46c40cf17558b67ad19b3a97f. 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/SEXMD0610106.
Det korta livet / The Short Life - Rilkeensemblen