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 0x448cce43fc0b308b846cd4900ec3b80f537f2b1a24d0c408bbbff1bd1ad444c4. 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/51f5f358-dd96-4f9d-b422-664426591ff5.json and https://artists.proofprofile.net/proofs/artist/51f5f358-dd96-4f9d-b422-664426591ff5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Power to the Women: The Best of Female Classical Composers
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 0x8013fe5add18f9683b6326f701fb03070495c89f1d69130fc5fdfc87ebb6dc53. 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/HKI199612801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013fe5add18f9683b6326f701fb03070495c89f1d69130fc5fdfc87ebb6dc53. 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/HKI199612801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6869b08cb457c2b7020594b01cc1cdcf91988d7a05e39659b3249f059bdd78b0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199612802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4114dd7ce65528fbc63ad4123fd7bb5aa30624432ef27dee35554141f90189. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199612803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b80019cfc24d1b088e0a758d52d382696d2fa4872be1c363557465da280d0e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199612804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbab12610c00a602bb3c705787418baf9591dadcf7d72d090bf33f41f77b708. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKI199612807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3329b62b0f9462d10775f526db65b8817614c799d4a349905b6ac64bb45895e1. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/HKI199612808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe806f7c48a10e1dbfff62e4da962eec8fd5365ee3552f42523d284252ff90f2a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKI199612809.
Variationen uber ein Thema von Robert Schumann, Op. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b46effe58947174661cc1637f1fc654b854946525e8c76a568038a64021068e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKI199612814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18c7f0c29739cb46bf8a4fe1337eddcda4c5d2d584c4e2787387e59462ddb46. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/HKI199612815.
Piano Sonata in G Minor: II. Adagio: Con espressione e ben legato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedec8378c31dfe50b6a97e59b51cc968446ad79b4fad7b298ae77b86fbeb99c4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/HKI199612805.
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
Piano Sonata in G Minor: III. Scherzo and Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14597e232119c4dadcc0ea5654f57c85e2643ed0978c03f2be5df245223b17c7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKI199612806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa483bcbcca4d4eaac53b2cfb19d501673045eac0fe128d18f9c9deeda6ebb4c6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKI199612810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3de4a8e24997ff0e53b3d9cbc27bf46026cc380fdb18f53b3fed8d77f485e4a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/HKI199612811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8ddee809aefebcdba43c7381514c92724761f1d2e0f1aa2383d12b2a7d1c9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HKI199612812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed40face088b876f06dcbb463837bd8ac1c5c871877f7b0c4e1fac305404796d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKI199612813.