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 0x7f2f142cca48f4b81885b3c33ce83c3b5f6395c9c959ca6d9167742bb22fe247. 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/67505a29-434f-4016-a615-e1e4e78439cb.json and https://artists.proofprofile.net/proofs/artist/67505a29-434f-4016-a615-e1e4e78439cb.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 0xf35c0d4208297d4bd4f3f16357c451bc8e9ba441af6a48b23f38fbab95d667b0. 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/GBKQU2278688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf473b4ae10402fe0053b4c500d3d2e3b7ca1c86231dfb89a5390478304dec3. 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/GBKQU2214830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9359e438ce761fcb48036584b9bb8bb535439e8bc046da9fbc94d347a623443d. 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/GBKQU2195985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29621f0ab499581f410d7ae585b44ecc9410ed34656c027608b30551dfd27bdb. 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/GBKQU2165811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84026e007529317e30586170b87a12754ed9a9005a1b8e8de43969e53952b18. 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/NLZ542100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf36b48be01a10ab1ce4d55c4c90e0be7ca897a4f6635f57067be9faf1341d3. 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/GBKQU2113612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076e416c52ac75aa06081d96bf17bc1dac56f9af7d74fd3c694e9efe62ed4b4c. 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/NL1ZN2000772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a2eff22557157715e3f95c2ee58e5004e832416a85358f3fce356c9d1f5dd. 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/NLZ542001965.
Call Me Any Name (feat. Alexandra Mortensen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92c9d057e6dab14329ceb5a7494b4c24afa71295ecac99f19ebbd25d149ceaf. 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/NLZ542001335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6cf11570ba4671f6a316a7d1c4dac1af982a798285415f45b07e732d01f1b. 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/NLZ542001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27647cf2920d9b24bb4a976caba766c3b39eb946203516e2512f19bf899e8481. 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/NLZ542000929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a7ce1403cc02ea806ffbbee051f6c08187c6c9efa08de5a99a4a22be2dd58. 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/NLZ542000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056c6310e9bf2f1c4e075f27e45fc2dbb5450f1bb0957bb8b18a438e6bf9c9dc. 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/NLZ541901585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4679ad5e542188011e276991945d72057d3c96052b321d241a248b6352c6a47f. 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/NLS3R1800243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34683e8efd2b6bab4319fdeae726f5b7fbaab8d00b75b9980fd59757c970d967. 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/NLQ8D1800248.