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 0xa218ce36140110149bc7206d308e7d33ca320d24f6e4fb4393a766af36854bfe. 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/4e140f30-6cd6-4bd4-acd2-204373454538.json and https://artists.proofprofile.net/proofs/artist/4e140f30-6cd6-4bd4-acd2-204373454538.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 0x0306cb328751674f4baf39271ab86574d57ba07f928876ab72f73811bd85e230. 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/DK2DY2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3244bef8ad41ca82da355a14dc5610660dacc44125ee873bb5e3831900e2e1bb. 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/DKADG2000866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359a2bbcf59ffb5ec1de971ec721e6fc00e1c7f2c739dc7fedc82dbb725a3425. 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/DK4YA2009212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f0d9c69a0df7e458f67dcf71be88fcdee1baf36f411373f5e16392efe1175. 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/DK2DY2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049dfd221e0094bcf6ca65b6cd1ffc95a4b1d46fec3bec198e246330e4a458ee. 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/DKUM72200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bfd3b1c68a2fc445cdffe8ef7350a60ef4b1f4bf119d1eef03575c800c67ef. 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/DK4YA2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359a2bbcf59ffb5ec1de971ec721e6fc00e1c7f2c739dc7fedc82dbb725a3425. 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/DK4YA2009212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6b5129acef5ff36a2c2ce5992a8a68584fbd5a3a5682268b27d8d34a479c74. 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/DKUM72200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf5f4bd8125b45666d9cd73abe585bae9b5931a9375644316358028d7634d72. 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/DK4YA1818901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a67a9414004d74d10d9b163ded0a6c37aeee92ecad9552d5de24472d865dade. 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/DKUM72400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e89b63c5666c642beb62da21bfc84cc895003248e9b10450a908d45a213a77. 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/DKUM72400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b82fc130c64be6e13199fd85d9ecb276d76c622a52d9d5b2390d40bc545b0. 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/US38Y2422829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd976a2df049255ed24dfe3472b5ee2bbe20060a0069f072cb5d640412273e8f4. 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/DKADG2500345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d468ddd19df79af28f2713a8c7f6491a17527d0ec878d352dd933d4d42ae87. 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/DKADG2500351.
Byens Hold (feat. Noah Carter, KESI & Lamin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4591f86a42b6af096ddb0b407ef6b743f7298084bfa58071c9740321651f291. 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/DKUM72500213.