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 0x4270e416584876e5c7cb720508192e16a9df7bcba0a396005e45f3c903c70e57. 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/86075fe2-0dfe-4c11-bc9a-ed9c2479ae73.json and https://artists.proofprofile.net/proofs/artist/86075fe2-0dfe-4c11-bc9a-ed9c2479ae73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
İstanbul'un sokaklarındaki kadın - Akustik
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 0x33780e70bc2be442b84163ae5a4d99808bea6d2b875144d05882e01cd2857fc3. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/SE5752184791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feda1f350a5a4c4e6437a1743e57051dfe0614ff7695e065cb1b74eb2278fe6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE5752184795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5eab3db3e197248d455d25b1acf99860554ee35def45f41a807c8cbb645b95e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6XW2148868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f4fc1208f452f7366dde458e8330578e94f10a619f7c46da038c4e55587174. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/SE6XX2191162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6904e3b4c1ac9bc7d364d881acd04cfa412855c0efd66f7daae5d18998a5390. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/SE6XX2191165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa057682a3e5789afa621a7510f555f97d200677e64b61ed0bf178ba4658ba1df. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/SE6SA2251014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5439e82c17e0ccb75180a0d76d4dc618310165af29a0b7282832b6fb2aeaf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE6QE2326005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a6f4332e6786b6e37e8950a4a7890b2d36877167a8b5528ac821642108ca6. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/SE6XW2550574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6397b437bebc7876d2b12fd065b52ea4460ed7dfb5e4dac1cbe9d5a61dfd8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE6XW2550576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8825742a1efd85101d6ec623f4aff9144d5feab3a256413ecbc95c7008cb26. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE6XX2541840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8825742a1efd85101d6ec623f4aff9144d5feab3a256413ecbc95c7008cb26. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/SE6XX2541840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6397b437bebc7876d2b12fd065b52ea4460ed7dfb5e4dac1cbe9d5a61dfd8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6XW2550576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb345d5d0d6f19a70f3c5ba44d91bd19a6784a47b627947e214059955b1ce608. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/SE6XW2550577.