thumb|upright=1.4|Artist's impression of neutron stars merging, producing gravitational waves and resulting in a kilonova A kilonova (also called a macronova) is a transient astronomical event that o
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 0x970e1d4e2e2ccf944ff0938ef91c8a350935c8c2e9a5de06d65a352ef1de7ee3. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0310595a-ee52-4f8f-8ffb-a132ec273f43.json and https://artists.proofprofile.net/proofs/artist/0310595a-ee52-4f8f-8ffb-a132ec273f43.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 0x6d08aef83859703238b444976c6971084f19de9c473a82ae0c68cd5c3e6c1e87. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GX3Q92572961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6216783d476c1e2315b4d3f294649c24c205972114c95ea7f8a957088ffd630. 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/GX3Q92572974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105febd92027985262b5641184947782e344907545496ab3c39cc17bc8c56a3f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GX3Q92572971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142dde54ef89614ea5244035f1e6eb6f4a99f61530d4424ef49dc390502b987e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX3Q92572970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88342ca8f84ef15eec815b4f45657a9c6d34a0e5204c84549e945ab4bcec175. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GX3Q92572965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf038a4fb24d7fc8c85d8ae284d98502d8a5b1b0f3c650f21d37a840cd4d1edbb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92572964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acfd99308eb47f00242c1a4a61478e9be01e8c88854caecf0fe7d21709bbce3. 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/GX3Q92572968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7359b380ca9c4a14ab1f4b24451c4821495ab7ebbb858c6fd045f6034240070. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GX3Q92572962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf41bd2e05c1c122df747c42fa21efd9e080ae83f4a3e42fec060e3bef0a552. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX3Q92572960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d55dc5cfb33b37d664ddad8d762d371c1589a829a974afa759bd1398e223e. 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/GX3Q92572963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158b99a5c8fabba44b7dc4a7f1f42e4119713ffc62abf3b6368f4ac09db48579. 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/GX3Q92572973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969059851df1e7280c9c6a6694e91b6972a74a841dd4c3cac5ae7eff97626c40. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92572966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adbcc1a74fd8bca1e081a349ba26d0b14c85cb1ccf0264c7938255531181119. 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/GX3Q92572972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dab9c0576b960dd104c6323bc4c437a22caac1e9a3a0845de9b514f8038d32. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHAF2540157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d591bd8820de30211880c2ee67371734b9f75b43e228cb189d143c0851c0828. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GXHND2578144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd998978b721cd976277ae522f89adf96261086645e25576da6a59e6b508fe10c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX53U2644166.