Sonder may refer to: Geography Mount Sonder, mountain in Australia Sonder, a district in Minahasa Regency, Indonesia People Otto Wilhelm Sonder (1812–1881), German botanist and pharmacist Other uses
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 0xd93c446115f82ac12ac8c18c3730121c5ea430faf503e84dad660b565f0aad7d. 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/835aa0d5-f889-4285-8185-d61b4be34811.json and https://artists.proofprofile.net/proofs/artist/835aa0d5-f889-4285-8185-d61b4be34811.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 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 0x879b5b2df0ce8acf56b4bf04237636e0bfdc9fda693803490cd07b71919316c1. 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/QM24S1700176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dca78f5153f264c1ca8298d54b4000d188a31818c4d3a1a36de400789c2c55. 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/QM24S1700177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f8b907fd02790e0ca8ff410d8fd5ee767a1295bffc04d00e1d5440de5af0f2. 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/QM24S1700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c4641f57da83dffde523da03a2d43ebd7f5e6216b92275ec6a80ebced91f0. 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/QM24S1650317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e7f0566ccf6a7974b1f417bce992d0d5087618ab87569d67a47d3c76946a9c. 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/QM24S1700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2df15a6c03d539c1b0bb16093b51020434dbc071e306277a69a493dbf7e8652. 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/QM24S1700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fdf5ca6301b95a88e5a2169999cc90db9f73fc839dfd0daf35577025975abc. 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/QM24S1700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c475cdbde5b84e2e46af77441125b5c13dcdce5845ad610e37c25616b22cac1. 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/QZLBC2200775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec10886125c3de5463abf24fc820e871fec3ba001963e3dffe993ca8aa36586e. 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/QZLBC2200776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfec2c209fc33f1a6b0b0e1144e04719724b120a52dd6b8d11f04bdbb4d8b44. 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/QZLBC2200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa9d2fd2cbcd4a339d2b1b9f29858091d089fcbafb2be2a4d7f32e48e55539f. 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/QZLBC2200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5958df00eb2686e51afd499a88816a921c58a7af682d55d772fe2d72b91db5f0. 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/QZLBC2200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff74e9c72e9dffb3173d9152b2e5f5971b55606bb75563ea71f4f47d1ca08b58. 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/QZLBC2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf2ca95c637c59aa413c89f5e2c376c18bb07665edccfe77761dd00bf4e52d. 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/US23A1501167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906dbaaa5301f793754609dc51477365392136cfa372fd7ae6b14c4f380c0222. 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/QM24S1801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dca78f5153f264c1ca8298d54b4000d188a31818c4d3a1a36de400789c2c55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S1700177.