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 0xe6443e71bb8cd1dac3ee689b9c6648b4fe90bb57fff36102901cc95a9915a9aa. 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/e2235815-7672-48ec-858a-2553d5ff989e.json and https://artists.proofprofile.net/proofs/artist/e2235815-7672-48ec-858a-2553d5ff989e.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 0x6c6b139e56ba92de4317ca4332d9ecf49d1bed19f9ee0f8062d263a60492feb6. 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/AUQ0L2410536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551da1e1cc3c7f940a7baae6bdc8b4bb762319f0b6bcaf34847e03e88a97945. 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/AUQ0L2407039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e56838da1e7954a830fe6545417e284f11ba92a760b86b3e6e27e56cdb1db0. 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/AUXN22444395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3affcad4c68b2d0e95f80b58f7bc072062580848f7515ef8bceadb200c5ba6. 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/AUXN22393869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca429aade9126f51b7514c7605ae2ed370e6f5dc663f006f3407183959dba4. 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/AUXN22335989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccd05d4da449688d3a16fe55321e6b6ea55f3eacc827e447c7b6ec8046a26f5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCAHD2356159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a8c4ab37cd994fd128d96847a397314519c2e0893f99e7840713f25270daa1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/AUXN22309481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e4ab420ce5076aa0a6e5c94b75a4b26350e87bf4ba3208f1e04b714d68b206. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUXN22274779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d236ef9a49464e279d1d6946f0000384aa6df66e0392e12a297800990b072. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUXN22249690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9dcb012b5f1512a7734c5e5b6dca93c457d1042b7a1430b0b7ac5ff226f06a. 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/AUXN22249692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5574eed193c1be7c1f9c84352dc98d1c1ad8bd6f8a3f8305b686d071d4eb536. 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/AU3DT2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fd90198bc580f468e564689bf090f1c5191011365fc6f95d11c7d94c1d18fb. 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/AUXN22197998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c463779a380abfcb3706fcbd25b0843b423cd2caadae501a23497c0fe16be7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/AUXN22150624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bf68b6f83244e3fe9cdc2b6632fe0b29f785368813d4c43c10d6e12d487998. 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/AUXN22120704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bea0ee3a8bee7106f052e4fb3226435f29ae9d1bb2a763196ee95808f3c62e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAEC1987139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ea3bf75e7934e4851c8258365a7f8f506315a6351d24bf87289473abfd27a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADU1833520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2ed59c56ce4f65805af8255b8867d8bd34c7003e1455d1dd732886981d48d6. 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/TCADO1826314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c769ffd75420aa6639ebb6ec44cb80f61e804daccabebd8e4e668fb2cf537e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AU5Q11900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e231e807042b5b772f7082e288a7dc691ff1e95f63754fdc278ad614b70c61d. 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/AU5Q11900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deae9191f8b07d3319f7f379c005525fbe69204c1cc61bb72e8e31e90599581. 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/AU5Q11900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ee293e1df4fdf2acf8a065c31e70934b1cfb6f87b762adc43360d3b59b31a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AU5Q11900013.