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 0x490f3affe056f96f5674021b8ea25f30919eaefc33cb8b06f78eaf3bdf163e32. 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/b3404b61-c56e-45b1-887e-7df5e349013b.json and https://artists.proofprofile.net/proofs/artist/b3404b61-c56e-45b1-887e-7df5e349013b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Medley; Herstedvester/Flower Power tøj/ De
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 0xbacd3c9671b718ef8a6e190ba7b76c9acc56d40741afe422167024351967abf4. 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/DKMV61203801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb3bf48d50e04156134f202cfde10e1b64869374488335841c54aaf6311871. 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/DKNJ91201309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba4d4ba758149f24dd7cdcea2e536db9ab5c2ce77401b66175451ed896c56be. 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/DKNJ91201310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a198d90439dac9af5e3ebec1d221cb8b715ef31f61160dff72806612ae42a2. 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/DKNJ91601401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3792c13906bc9ec3ce7862af20d3d55ba3b267b0895cb30cd706743802f4f4. 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/DKMV60300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1eafd9d541d3b63b338fbdae7c14a996557355beb292ed08de8b64086bd29e. 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/DKMV60300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847a7b7c0c33be00369958e21a2d210e3fdc72525df7f6e5e67dedbe46d66c01. 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/DKMV60300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13dd30502d9f83c9f219f7fc56f746047dae4ca3b91f3644fd8fdf7b8de438d. 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/DKMV69300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d24e076fab067ef36ab3bee8b1105d34d1c0c5ac01d1a24c67b2aa870ffd87. 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/DKMV69300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed80fb14aff22f5ecd9bc49b9fca6649ea1f36266c9aeaed96e5da61e82dc575. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKMV69300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e121cb147547737260038e0898bf1e70a5695745a535792c6e32ab0d4c108d. 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/DKMV69300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6b681539fa2c3f5a59e1e7df0c35844fe536a947f11eb4909a0cf1db0a77d. 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/DKMV69300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7303794203919d942b3f912b76a7c88c58557a67d074021b1b33301d9859cdb7. 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/DKMV69300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddadde13c8def3cbfb5b9fb254a7538e695756ecce7cdca00a10f457d38f5f65. 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/DKMV69300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8836da1aa89d2652c587e86c15caf2b62f9e6f79b2ed8e23daed17cbc85e9a6e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKMV69300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13abfd8b29f3063a9ba589e658d86e5fde98d380abaa431a7ba49bd926af688. 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/DKMV69300118.