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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ba68a1f1f5c772396baa5347813f7603f36fc96c4d0b3fdcc739bfdf3d6aa3. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa12cfca-25e1-4570-9244-63ec96f619e8.json and https://artists.proofprofile.net/proofs/artist/aa12cfca-25e1-4570-9244-63ec96f619e8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2110a759a62e3b7c91cbcc585d2a8f5f78758c812358ddf4127638360934a7a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51222231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed4424fc834080c3830a41c054579b7f6c888b9260766c5f173cbbf29ea1f60. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51222232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c257c970c5cecdedb4aa71582ae827d576cf6d00998b24ede322d2ee2db5a5. 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/USQY51222234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc898c638cc3967883f4eae171b8c183e08c33b52e6cd44e8a84547817ff621b0. 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/USQY51222235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779f2494a067342ba9a590d708109bd59d7c8d4f6d737e559ceaf7f62927668d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51222236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224d00b76712b29efbcb2d495d7bd0508057e1ebeefa3efb104294a8adb12310. 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/USQY51222237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c0cda68dbf6423947d1ccdb0f6b273fae510715f63536038fbdf303127dbff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51222240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c65076e9a6c4403c4da3b1f9af822316a3a566c0c19ed8d9731fa905ee67712. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51222241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e81cd00ae7ef21cb24159eefc1e6570255b660983f4528cdb1eedddd87f9ce7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USQY51222242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5434309dfe6c1c4a33d6eac199a707882d7efdf9de0fd815460f4e1c83a3d2a0. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/USQY51222233.
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 0xaf1c5e4c7ba651a666691e543e34eb9d644b7cd97f24ff246651f1cf6d85cd95. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USQY51222238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7f0128390437b7002659a0efc6ff58e7f5cb1b2f505e1dbaaa02ab24c3df35. 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/USQY51222239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61958a9529f12f40f85b3f0b4279af00acc088e35a4638306d3ca6af85e13108. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USQY51222243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fecaefe92463433f8c9c7c82b8081b2eb49d49ddc849b2fc9ac9ad9bf22a4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51348598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9aa9fd402595909bb324c9d4b74c3da69afa347705f90e551ea2086b76c3d7. 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/USQY51348600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4011012ea916710c2cee212f191435a2b02d3c45d4757a439ad5de77dcb8166e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51348601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60962f7b1540c793dc13fee390f8e95012d2c4071f04c85c84fc6a44e5798cb3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USQY51348603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc5470c2b0da3b57ca1ae3e5a9cea487b2d3fa148fb72e108328080228852b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USQY51348595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc048b4bece6b2579841fb4fce736b5ae16308b209f899c55a05fdcecf2421b5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USQY51348596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ebe5892bd44d3ade06c97c55124e7f65f8d40ebd6b2f5ff4607a8bf4d2aa22. 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/USQY51348597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9667ab4b42150b3fd3b55d9ff3da98a11dad95cd8f4c77c931873bbf3e47cd5c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USQY51348599.