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 0x3a9e726db6e2f0a5d3de0703ba7e9d41b7ac911a087b108001b5137a8d71aaed. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84c0f60b-4151-43eb-953e-ae7cedf7229d.json and https://artists.proofprofile.net/proofs/artist/84c0f60b-4151-43eb-953e-ae7cedf7229d.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 0xe90415511a8c2a2602133c7243f305bb664b69d9a01b4fbf18d1970c79b38108. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN72031357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02d1722337c06fc6aecd3d0affba22205d9a631324a1262e8087db0318db2ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6G2076907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdc098e8041cd782fce29ef543bcc3fa44da05e22e1a18eae909aec7af0a4d3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYY2034384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e41aa5f73d31ad29020881081f03818df86d3f97f9818f1cb9cd1c7939d3a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6G2076910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835d9012312596771d3c03b4a732c9c1d97e64d5e5fab7bcd2566e4593f1403. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6G2076911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30d0336fb4f6b0c0bc1e7f87f3b716fcc1298bac93c5d76ed29e9b4a792137e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SE5752403347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d16eee220a09edd66a2fb344e07892f2473a06e1888de2cff4e1700f825b90. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5752422957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b2ef7c40688cf54e94d60d69b3a560c2d7e4526c2a963aeee5853835cba97. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAS2162359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ca933d5781a1cf74c78f12718260b3000082dc82a275dcdc3e42d06bf6a639. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6TI2307070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006778a606226507589ebcdebffeae442f6bcc1638f169628568f52825ad8715. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6SA2350801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712a725812d1586ed83867546c47b36a2324143ac93f9269e60ea0d0754bf7ae. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SE6SA2301783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2bb87c9afea6658c4976b9164964554608daf5cfafadfa4ed519223249e2a8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ42219086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd180af635a92c3aa3d9737382f78b76aa2ec546103c45e1ae8688587034ec9df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE62M2386641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8f59dffaf50498f4e5db1ea5f6611cc672e618c4637879f392904a105c40a2. 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/SE6I32475989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e34e8949224450752efcd85fcb5faccab56ce6004ac2aa511aead85edac9c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/SE5BU2487719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7193331319ce8812972745b16109e2a33c136923cdaf99f10abb72ff82d21c3. 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/SE5BU2479464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccad0b22f4992cd8c92a478175ce7262d02af05790949c3298d52edbd33e1af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6I32417630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52854da1e3bfd137db99cc5ab592726907e24d3f2e4d3c9e24566e96cb609ecc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6I32417631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde17df7f40fd119d274a72e42bbdbc99a7725b42af3b28ac7dcca7ecb8a7a4. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/UKXN22511618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dd1a69f093f4d457d2be839fbaaefdc6be9a6f2d4c902237132daa88ba7169. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UKXN22511619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e7e27733d03d187f4b4e69c36c0d312ba56a486d59d3343e39fc9b2f592263. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GX53U2546486.