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 0xe625cd542a4cd7fabf98d814236782c204ffc69f85b3e0589d74f27561106be9. 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/ec85f698-0d6b-4c0f-be54-c8a6b62df831.json and https://artists.proofprofile.net/proofs/artist/ec85f698-0d6b-4c0f-be54-c8a6b62df831.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 0xa5b89783eaf28342b5e7cfaaf1df1dd2a19df90aa6f1ef790b91e0434245bec5. 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/DEG932300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42000c728be3fde9374ff1ae3f39cfd5f8bfd9991ce06bb17a7b3c1110e64ba6. 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/DEG932300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a15eb88996cb7f7bd65ad7b9784089890af3bb0c493f00fe0f7ae10c25414. 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/DEG932300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b89783eaf28342b5e7cfaaf1df1dd2a19df90aa6f1ef790b91e0434245bec5. 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/DEG932300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42000c728be3fde9374ff1ae3f39cfd5f8bfd9991ce06bb17a7b3c1110e64ba6. 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/DEG932300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c8497b4151da992d0db35311f24ba5c018a87960b0cbbb3f7ac56413cc0b91. 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/DEG932300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df52f19291d195a6496aecf7d1c101e410a695e6661ed483c5fa3643be0a1d1. 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/DEG932300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b89783eaf28342b5e7cfaaf1df1dd2a19df90aa6f1ef790b91e0434245bec5. 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/DEG932300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a15eb88996cb7f7bd65ad7b9784089890af3bb0c493f00fe0f7ae10c25414. 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/DEG932300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c8497b4151da992d0db35311f24ba5c018a87960b0cbbb3f7ac56413cc0b91. 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/DEG932300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2571cb34a64178c5462048a8d6e762ebcc5e56287fb7d21cddd55418cf2e7a56. 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/DEG932300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342e4522c479b1551ec505fc9b6066e45fd4781e7188441fbfe9a743ac37ea89. 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/DEG932300709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc3b0fdd623f0151f8a72b94a89b79bad6ea41163c03c8f6508db8cb11b74ed. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEG932300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42000c728be3fde9374ff1ae3f39cfd5f8bfd9991ce06bb17a7b3c1110e64ba6. 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/DEG932300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6f1745ccca048a2895afc6eb80740350b22e065d9c97126412af1cc4ec5ed. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEHE42400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0922814f362aa31f123952db2665a6f1fe031182c494acff1969411877fae78c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEHE42400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b1fa5760eaa0cd9d465dd5d58b6bc8b1c8c0cfb56b9efb290738c0da939284. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/DEHE42400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd4e944bc3174c2156bbbe35ce51eceb6a23ade93c9bf6a24e16d17e085b2c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEHE42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebea8ca7292aaf9870a9afd9edabc3051e1d69fa8b4f63b9182e1db0b0f9cafd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEHE42400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f12ec0d32bd7947adc49b985e182834d52c5b9abed78b0cfc127a9d315c500. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEHE42400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898e9ed538b8670a1ad244097b43264cd776a50869bf9508d38fc41a6a5345b. 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/DEG932400619.