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 0x712097a2a1182976e9079ec393a4841090ee0ecffae3f5d7ea585011b8ec9c16. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8239f0c-bb69-484e-8d59-191c8d49833e.json and https://artists.proofprofile.net/proofs/artist/a8239f0c-bb69-484e-8d59-191c8d49833e.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 0x7de5132e63b18395a870d60c5af7eb136ca77eea3f15438366c01276d80639b4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/UK9AV2301320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11c7b1aef5a798f253fd6f00679742c506fb72042540d686b76adf6ebf63e2d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UK9AV2301321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14076ad3b0b2366bae19d4cd028823c8d4f6872b48b07bbc7d3e7984a434c4d4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UK9AV2301322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33435b595e04348a3dbb291829f791a306adea9197ff64890bad8f8a3c95064b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/UK9AV2301323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c114e8a633d99391713e06f4fb71f15d327842139e75dd9821fa42992747993. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UK9AV2501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c11210d8c172959a84b18ebd0388bcf7318674b747e8b5ccff795d78fd8ed61. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UK9AV2501420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17b42246a74262cfc37b0fd8c64b4fbd3209626093f71009030ccebca9895b0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UK9AV2501412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aa969c319c3cfc915934c3a6be4ed763a0bacc79608f8dbb567f06a2a59bb0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UK9AV2501413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c114e8a633d99391713e06f4fb71f15d327842139e75dd9821fa42992747993. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UK9AV2501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0892f4daf9f97eaaf4faeaf1949c3e9bca37c83a7a43406952751fedef3c4c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/UK9AV2501415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b85d415230e7452dd8f599780db1f7845c4e348d3e61a69ab6aae14cad7b76d. 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/UK9AV2501416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ad6e6527df41f47334c156aba76e35cbe6cb06223408f10b5702e1d091bf8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK9AV2501417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406472aa8239110a192cfb4d9f3190f665d08e04a70d52d41ad3231844317bd3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK9AV2501418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea2a8438635c3a41246b7db114a4967c9a93017a5e51e8725a1c3c2fd6c0b4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/UK9AV2501419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf607f11a36a4040a06c411dacfddce6281fa46f9ee282a376ea24a8539b425e8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/UK9AV2501421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6c0eb833877348b4b6b92debccb0964c6eb426d606ee0ad30d7a959dd5969c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/UK9AV2501423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab13a1708789228f675ee26536ae7280d6e428ee4a5f7e22701e762cee4b489. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UK9AV2501425.
To every squirrel who has ever been hit by a car, I’m sorry and I love you.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91c66d569f87f7448c5ac6ae30c0bd426c99c3925573dc75982c7aba9f9a7cc. 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/QZK6F2451030.