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 0xcafe2ebae1232b4710815b9580aad67feaca08fd576ace787ed3830fa9fd3e5c. 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/eac6ef0a-7a5b-4bb8-a600-adbb18a8ecea.json and https://artists.proofprofile.net/proofs/artist/eac6ef0a-7a5b-4bb8-a600-adbb18a8ecea.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 0x1cb19d561ae9626ca276c31c40b3846242df5d510249d2574ea8103c26c14f4c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CH0012100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c640b963b882841ca112fc9e7abda34359173eee23f058c3a2b282c927c7d27. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CH0012100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381f407fc161917eb86cbbe4749245ca79d2766324b68e7fe6451a1c1702fb76. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH0012100112.
One Life, One Soul - Aus "Sing Meinen Song, Vol. 6"
Sing Meinen Song - Das Schweizer Tauschkonzert, Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8d8d20f75fc934892dad7583957dc6a5754cb12eec516aa1d14b2a87e38b93. 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/CH0832500020.
Dancing Alone - Aus "Sing Meinen Song, Vol. 6"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1981c26f5271e506ad48a9c9b02cfe714c617717fd2d37731a81debe61d60cb. 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/CH0832500110.
Mini Fründin Isch Schön - Aus "Sing meinen Song, Vol. 6"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd34864717b9e655f3775c755b0320c1362140179cf2dd65c42b06fe562d68c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH0832500210.
Don't Stay Away - Aus "Sing Meinen Song, Vol. 6"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d12d3e69de9148eb4c92f598c09bfb7dd7acab678cc063029d951063ef3bbd. 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/CH0832500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e5fbd72a2575c6d62843b2ae0b9bf2934420f5e458b903dde3f97500321fc8. 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/CH0832500340.
Pretty (Loreley) - Aus "Sing Meinen Song, Vol. 6"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ad3d276d8dfc1f659fa221a93178c8d7bfad2dc9545cd9f68d471fcf5fe9ff. 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/CH0832500370.
Loreley - Duett Version, aus "Sing meinen Song, Vol. 6"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12af0f8078538fa228123538278afff984f6dce74c85d33eabf3aebf51ef7e24. 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/CH0832500460.
One Life, One Soul - Duett Version, Aus "Sing Meinen Song, Vol. 6"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066af93c43b1ae66c553ad7c0d3f9780e487ac416e3c3e885e1a691689f22263. 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/CH0832500480.