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 0x27eea056fe2dbfe96ef332f1bc91943616061e6fee3fbbe14968467a400aec52. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08611785-5e7f-4e92-b2fb-f33151adb32e.json and https://artists.proofprofile.net/proofs/artist/08611785-5e7f-4e92-b2fb-f33151adb32e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die schönsten Kinderlieder und Volkslieder
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 0xe1d012524d387cdb8fb377082e1e99776a82e2d91bc9de0b2636f0d27176271d. 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/DEF076207080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43290c922c3447fca0a3f07b59dfd4818e7646223914efa7a8689401bc792eb4. 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/DEF076106090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5009588b613f264498c26eb1eb282ce410e0387d312e131c80897593765d89. 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/DEF076207020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d29b0e7ebd94bba7fbe3162f19d982301bc7b961f964838da0f6631afc154. 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/DEF076207030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb7e823682df36ff40889306696b71ccf0e3e1e83a6bde210f11b74d133988. 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/DEF076207240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dd0548be8fd84788556223a01852c5a5e2155d01d7a18c3f15ef9f9e0841cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEF076105940.
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 0xcb75c72092004d7700ead59e0ede230632f4d0418e4426fc0892ffc0b1e081ce. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEF076106140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76a124f67101fe09c4a9e94b3ecdcc653d357eaa2eca102ac160e92a2868789. 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/DEF076105980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398db4c078ea571c492873d16c7aa8063365d3c9ac19d206893a81a473cb5d31. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEF076105950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ab080fa1d46d8340d3a74582e04cff4693c59b7a1a5a57f5feb0bd062932a. 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/DEF076106060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb34f965c8b743bb978cccc36653e73c67724fa2aee80d025e5d6e1e1d9f79e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEF076105970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd9e474afd852497af08ee01bad988ad761f1cb9ac7cc7a1e9e3497a627652. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEF076106010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1e261e60500af62dec36736b3e225ec4f62b2a31120d0d7add4a1ba7ef3ca9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEF076106080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a84de23ac2431b0178f578dadbf3a521b38af40b15a4bca71e375447d64614e. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEF076106120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cde6c38d2fdb7863bf582328ce26533aaf5c02ea28b643146d08425a95c7b6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEF076106100.
Wie lieblich schallt durch Busch und Wald
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe628dd923fc846e365af4896c24f3587b42bc9865e373d1cbba1cbc58b422ddc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEF076106070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8073b83e615f9f7c05dd3607351e4f170a235a98b99e5cfb481edad2c625c7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEF076207220.