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 0x7e17ff77872781801bc8ed3adbea72110604e395a398d97f0f7988daa681035e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58ad3e06-9951-4184-9d75-f32efc8be07d.json and https://artists.proofprofile.net/proofs/artist/58ad3e06-9951-4184-9d75-f32efc8be07d.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 0xad5c1337f1b628d8fe6f741a078c41f567d8a5a2aeb469627dcf57eef33363a5. 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/QZMEM2376384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa085b2d657e9f4a72c570e61d82eb446862441ba353abcc5a4c25ad229d7f696. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMEM2376387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b618aeca7998d21478ba76418720813b2724ad29d9708368d753a1dc5621c. 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/QZMEM2376388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c25dd613d92764a12ce2fc6bcdfed050303334543208b85f5d5dca3606982. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEM2376383.
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 0xe232f3039f9d96863b68b6fa23cd7265cd431de9b1115448db5c4522ba80f7c3. 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/QZMEM2376385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fd87ceca7e6760d4b94548001443b6cf3c575bd74d83fa475df7e70ea29f96. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZMEM2376386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4a42cdfae2d322c107d89a614a6090657ecbcf10a74028913772f415be5e0. 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/QZMEM2376389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c47beaf2eaaf06081e290897476957985ce742ba805b0245feeb2af5447184. 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/QZHN92063671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d00e295b56053e89919396b7bab5641f515ed44b290af8785c17db6a4f6391. 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/QZHN92063676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e151c5b18d008cb45342a3ecea69a6a0fcda1e94f786df4a81cecc00f3ae70. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHN92063670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cd49cc481742065bb631322064824e5abd8e130d3a961236f34a78b4bb26a7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZHN92063672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ac8d7bc01cffcc45cad42cd243f33f4ea92b8ee93a6a3c28a3f29a577f0242. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN92063673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0d2eb72f5f641a60b8eadcbf29ada6386d34541ef28aba19ff0ab3b1f9f83. 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/QZHN92063674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4d46f3c40dd4365a31ac22ee8ab0e6dc95a2516f500e722a0f8f931b3f1063. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN92063675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f9ad8081ba9f2052dd51f461b5fdc9520cc28cbdbdeebf376eb64dbfe04b07. 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/QZHN92063677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf046762f568380c3b5c13492a7e08d6a1cdf47f9d16b52fcbc337ebc87bbe4. 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/QZTB42225594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e44b7ece44f75486a91b7f4422e00f2fc9802cd1f0ae33e65bd79d33a97a66. 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/QZDQH2253682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82007a80f2f1571c15727eea3fab8793e844f5e8cf26f45c3d60416783c82708. 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/QZDQH2253684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0647f0a6df90e8a9f9138d28b4339999c0e706b7530ee9de25ebd50d512678. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:09Z), 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/QZDQH2253681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bb95b6312f98b03ffc7cd8c4e7574e9d7d696ca20fb6404118a72e5fe08326. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDQH2253683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eb311d89043c90a1a888555688fc852b45c7bf27b6586bc1bb7668812940c5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZDQH2253685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc077abab62633e2d5e3a90b23b72b8c58df5af67a23939f75e973d7d1ec80. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZDQH2253686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2889c4d5ab9abbb62da3c3d73ebe656b6abe3206b2efff679343e8fb82705242. 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/QZFZ62254408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486fdc58f99f311b295efc88da96a00e5cc181aedaf0698814ce135fd4a24581. 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/QZFZ62254385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9245bb75eefe7b980efcf890530e09b48e62fd720b155a31dae51be3a5bd4e2. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZK6K2130051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c480ded6d27457161c3ccf0eeca23da164e81b3ed66384dc1f47d3204281a. 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/QZES92142558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e85103fdf4c3a29f8cf68b5a36e4f1b3daf273f47f164e890d49f584ae2d57. 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/QZNWR2076061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb074ce92f4101cc65c5641b8d34f48f6e8b7c4698df572b62406984948f47ce4. 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/QZNWR2076064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34df872081883eb2b23ce6bb495d3dfb57ba385318110631f2d4592ed4f7e010. 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/QZNWR2076065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9648b927b7351c65d069437697788c28f947b34c2d8a882a115210ff23825e. 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/QZNWR2076066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966efed9716acfc2385a6b5f4212e8f9071bf72235f98ed1822f4fd90ee2dfae. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNWR2076062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9484360b428f09181e66b18a798b72a20b479840327cb240d9ee399f75bcf1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWR2076063.