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 0xfe2ba4317fe7ae87a18af2894cc510655e2ff168efb3874f09614953ff8dab94. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/543a523a-4afc-4802-9f3c-d69f6ff5190c.json and https://artists.proofprofile.net/proofs/artist/543a523a-4afc-4802-9f3c-d69f6ff5190c.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 0x2176a9e537b3639f32fad6f27e69e9707309c7797f7181309e98964d96bedbd5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DED811769100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203c6248565e725ad4586bf89fb3310bd326d3e6fb053e64bcb83c54a0e8b62. 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/DED811769200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f434e238ad625942b070d4c67ce1f356574d3b9d1a0928cdee5b60b75f9d8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DED811769300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3fb3b8da9f33d18aad1b5f1371a206f2471aac2420817bbf79821a00d03fa. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DED811769400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45321663d5fde64709bc622f7d4aa34d3d20c315e7785e37f073cb26acb29090. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DED811769500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca1af791334a17425f55245d3ca2ba20e4090c28d19ae8822ffcfc6d4ba2e62. 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/DED811769600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e548af9f22263bc0e13022041790be84f1d8c67db3d642ff3c11497b5321a70. 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/DED811769700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65471d37530623e7de6add890e8f7f69b50cdbaa7215c09806a7e5da00376eef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DED811769800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3526498b2270dd6c4ef8ea4e6a8557d40a57034bdf821ba18245471849aadcf. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DED811769900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb435e068f1d316529849db6d2943cda50f38d3d00877f67f51b93b721d23ce8a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DED811770000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8bd7a6794f8e3a76df117deb53a3065a35817149533b155fd31e7fd7987274. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DED811770100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeda558276e9b85e2efab6429150b51d32c43408545470f5f74c77d0692d7ca. 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/DED811770200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad0847c91aa027ee70f522dda72a9654a5f25c65b1d3c2e7067556b1ce2a0c1. 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/DED811770300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993a18c3ea5f99ae85673d7a94744ab89456a591129dc19e8979e50bc16e80d5. 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/DED811770400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf013dd5f93ef8fab2de54f34b709aef0fe3930cf7fdf03a5c1a527a918b65. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DED811770500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92ba50526535353f1caa22287dc07c44040d88b864d4f9ff1326c8817affd4. 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/DED811770600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72928ffe56de46a41bcfb8c7fc15f4e51600e2e2dddda88c291f7487986a3a5. 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/DED811770601.
D.714, Op. 167: Gesang der Geister über den Wassern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a851a9972efcba52288fba27c0ce669613dec2847a3b3dfd1eb9086223504. 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/DED812360100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65891fe31fc1631c36e42a23394fdac01d8affc06690809b2aa7f39533301521. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DED812360300.