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 0x79a6bc5859953077e3442d7333c98ab1cc9b787b1e6a9c7b0ddaa3b53c9fc2f3. 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/1502f519-71ed-4e97-9b71-998fa0a40bb0.json and https://artists.proofprofile.net/proofs/artist/1502f519-71ed-4e97-9b71-998fa0a40bb0.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 0x45d0817d383bc06e36b3a7d207991924054c1146ab0b98783ad601206953ac24. 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/QZHN42243991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071c5866f568c0ad86400e4e88e903a30e6d805bdb21f40bc1f2e6e640b67bf7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNWS2245760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7581cb9e110955db51d2d5c4c2c2532be6ab046de220151ff3fb0b363a2ca9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNWS2204934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076ae23e5321ab0ef5464865dec4226274f4cdf987fe11e4c75d7455ac7e361a. 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/QZTLA2313430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852a6abb0dbae4c3045a39b29240ba8ee6c006d6df6ae1b1429146cb7849cbe. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFJ2372251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad76f4825f5be4358f99f0d9f25ef31e11f84ae4d8f14cfe707630ec98660971. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFZ72425995.
DO IT MY WAY ("Chantal im Märchenland" Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eebc3affabc0ee0dfb7c30cd702f4121cf0d4f8d246584343fafd2d6dee3cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAZ2413241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0549dd093a94f82021c92a42c35a8d50696ce4792781edf4ef1f702738fd53. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFT2478037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515689df0c2581ddca9f3fb085b9812737b33cdf8b602dc8b265d17787a7c89. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ792488731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ebb449504f65c3010c3e8fa119a0462ee06e78647f15ecc4e8eafc95d2131. 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/QT3EZ2467499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0bc0e9074e29985e4e5131bf2247522edf80de2a5dc532f40f90fcbf1568fb. 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/QZFZ22554380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c882e3ec0229fdf663828ee8d2794437c262100384f5d3cdf34d8342cddea2d. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZDA72526401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051f6953d75a6880512f799e1de376faf94b4ab8d22a2141279e29c989806471. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFR2524482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a345dbaa93ffba9c04bbb5bd768f0b58327ca5e5fdfe11f5d917ba285b085. 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/QZWFH2449775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d15db38dad6e93a66c3acf4d68cc62d516bffd256347144ba5c9d68cce0f038. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZQAY2385336.