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 0x40cfd9c3a59c13196c45f0316a49d97b38145e05dcbd355100f8269a6bc86c5e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00272406-9004-4e6b-b35a-1e41bd659ae2.json and https://artists.proofprofile.net/proofs/artist/00272406-9004-4e6b-b35a-1e41bd659ae2.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 0xbec982f6f9e34da1a54d3c1c1c93220a4a5fadd8a482a909cbb210349666239e. 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/TCAEC1960907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3865b5835b85ee420e462c04afffcd9d36a921108f470662ffd9f21aa44e2c9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCAEC1960912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35354a1cb1ba30b48293f9ee24ba0c3da29ebee85e445b7bc7a4747e86c9f1da. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAEC1960926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a602fe4ddfb9f977d655174b21cf21418e2523185ebb24cc02436347937386e. 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/TCAEC1960929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50336a5298f8ad3f624ce8bf455941eeb568d22f7d31df10efb5d0d5dee29511. 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/TCAEC1960932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90e1166f22b082e712f90e75a1a93fbcce2e6944c34dac16e509a082e0961ac. 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/TCAEC1960958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea71bbb0ae287f4ede04584721b95bc2e191ff169ad02535cddcd23ad5b3d37. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCAEC1960978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7055be27df08e418d636d81a0c36bc0395aeafd36dbf0c99dd998781527bb6a5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCAEC1960983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873aad5f824d6154f052bb0dbe1682ec22ea3d183705dfc91a74799c73126139. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCAEC1960986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe817122dcb158c8c773e94557873a5533bbd83d789cf907321cbc8cfd1203ac3. 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/TCAEC1960990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f63c3ec113ee09e4c294eb489b02df799990f939480271ab95733d6a0fe9c. 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/TCAEC1960993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657461e51f9e49cc5a6b91575ad3043b8b634a6b118b6934cc31f3059d3270a. 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/TCAEC1961004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde98288416d71fe365837dc222e59cca94b32471e37f8ba850fd1cd1b6103d92. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DGA0M2417893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab72577ad9c8d43bc04feee1b03f854e99b76fe87b94a71e56e54e6dc22c235. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DGA0M2417896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f307dbb9b4c2a744659a606c01dd18891329b054892b6c7d143f59fc2850c9. 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/GB6ZW2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30061fcb8f9f46ee4eeae50d64ee0effd81be7023f4619622c55ddbff2b72f7c. 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/GBVW22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6827d9f8878528a135695a14bd185a9b7bfbf33deae1d85454bb85d593678b31. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBVW22300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc26486f42a603ea99a2708a876aeaa17506071af88b97aa1a3740b95f9a364. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCADZ1884779.