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 0xf9c93c640f745a9b22853c2af941eb90705e86a9a81b9972e88990b3b8925894. 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/28716fdb-31e2-4de9-88c9-878438b71034.json and https://artists.proofprofile.net/proofs/artist/28716fdb-31e2-4de9-88c9-878438b71034.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 0x7dcb913f71b67b3fed5a0efba4ac50c52ee6cf9fc816831102ed8d32a30c2619. 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/ATRB11900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3a0f0e363dbfeae5e701383e58229a6d7d935b5161d1b34d146b1856ba3f05. 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/ATRB11900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4e5f5d12c0581ea1b8aa1e722f707d1ad6747520451c8606f0736f61f0606. 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/ATRB11900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572adfd367ac0eb81fbd758472829dd3950001b7cd36725500c2bc1cd1a8a0a5. 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/ATRB11900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa79dd1401c39120ac731e2a903440523e1373415d376d41dc6f28a824d5a837. 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/ATRB11900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad95c7bee318df57be0101c8836d5970409db51460748f524d387e6231a1ca4. 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/ATRB11600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6febc4d6adaf17da9bdaee2c0a26686f77f11f3dfd3527b61a2200aa42d7d2. 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/ATRB11600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7565f96693163aeebd8dd0c2fe14146b09074dc10bd1c68822cb54fd80fd22. 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/ATRB11600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de62b79cfd5f7e7fb595dce7078223eb5f8ea396a123325f4d4113ab5bca3fa. 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/ATRB11600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6580115efb1e7ff0c504426fc2c3a0b857797f03f861252a624af51ba8a70066. 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/ATRB11600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bfbdfa5a3f2c579e252b081ebde7f0016891bf961eaa5d78c7594b9a44bf46. 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/ATRB11600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da3624b716bec03f1fc5708d578da9d1244a55935a81b519ebeb6e6d7e148e7. 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/ATRB11600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c2c710e6d4a58670a4ca1a7fc661556bfeb35d8b8f2f397b8a0b27ac0431d. 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/ATRB11600015.
Ohne dich (schlaf ich heut' Nacht nicht ein)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccde1c84621a5f4c204b7e541af979b9ae665ef0b319f443ef7e2c5137232da8. 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/ATRB11600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c41787088e8da63fe9643be8b48f14d7cc482baf97f26f1b7555bd92fa9c20. 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/ATRB11300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bffc2e80c586715e39bc53cb67129d86ef7e4dc4e2b38cdea352e06e65d8dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATRB11300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfe58dea0c63c1d4bb915db45068f9e1c6048dd982ea940eae1c4cdb843c6ae. 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/ATRB11300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b95a039b2e60ea2cff0df310010a53c8e9e33ad7d29c55647046a66e9c391. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATRB11800051.