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 0x442c5ad6609e1b7b09d1a26d612d4f60d027c70aab5cf1e56bfcc5fa481cf5d8. 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/35291165-0627-470b-a4b6-6dfb7c80351a.json and https://artists.proofprofile.net/proofs/artist/35291165-0627-470b-a4b6-6dfb7c80351a.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 0xe3d23a1f8c2ae3024acddbd4952414304b4099263bd43c9bcb43442a5f5fd3c2. 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/US43C1628025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0e07a57ebcf513291f26e878cc39aae49ce80348fdee82096ecc8f07d4983a. 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/US43C1628027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1cdbb5f28727309247025b122d02d66b78339c342f4f48af6415eb7ee077ef. 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/US43C1628029.
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 0x65d8b48078c4a82d76c282f900fa4791613c38a7a89639ba56d2ffe96b86a349. 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/US43C1627045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87dbbb6eb1d41aa1882925e028384c40d466c205643185d89432c03115f2514. 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/US43C1621850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749cb97287c77c1e4f636a9fea1ad197de435c9f4355643e21d35d47bda4942f. 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/US43C1621256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ac1894e79873f455fa5e42bebb93a426b2b2f61bfc6332835d91b7a19e7d82. 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/US43C1620791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aec5d6f65e77b451b83084e37b6860be0afde7acbbfcbcf8a077a429cf75c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US43C1690536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace109b841bf5463e7c4baebe9f370927c4b8b1ebac13a5821510190d7576442. 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/GBKPL2148540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94e4010527693e21e419207c351be5360c9aee119a90797fc352313b23bd69e. 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/US43C1614683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e76f19f2e45245daced00a244bc7b11d25653e33a19a6add8a19fc267ad5b5b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US43C1613607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd6ffd063f767abe1762ba22d317a0280ec3009c586e80f58cad85e8d975714. 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/US43C1612049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee3ce99179e35b16b9cb42574d5e6c658527006129ca22103f0646e107dfb68. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US43C1608295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c5dcd254286994ae63ae9e6f6288570ab430c50cca37caf76224707f8b692a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US43C1608283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcad6be0da0cbb9bf240d345dae5acbffe1139f2881a0b37a51967bb5e3643f3. 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/US43C1608292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd920970eee45db82b30e0f3a0fadd4fff8f705337189975e3a47cf5467eb7a2e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US43C1608289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e5c50e5836697d32e122f53137c26ebe77e149f084d0c3a814a2f7893ae4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1608286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d5e2e05bda94d7bfc77ea7898feb741d42a5620a593116f728417f8f15b205. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/US43C1608280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c0a725cada13542dad282361ca171b4bdecc965aec26037ee2ffaeaafd308c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51783634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9c371a95a1c03bfb03d09307aee0d6ee728d689e20ad1f5e957451fb8c745c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCACT1626564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c538d715f15ba7c2c6881361c6bdac9e30635a46ff14ab7a4d7f3a660c5e16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1603536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a0f7c15ecc37b127ad50fae7a17ca9dfd1fa12d3383d8c104cb063573269e. 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/US43C1603527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe378714fdb2a086ee5eda1958649305a7757cd49f34e0d9e66d355d8046122c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US43C1603533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2422cc0580c1caab9e5fd4a04b75ad0e6ff8d19b2d523692b0c01cc2000ee7bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1603530.