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 0xd7b139d7b9b46d76266c0b1a351e9043e59ff41e71a958ae24ca86e120b0c85d. 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/5aa74ca6-ebed-4908-8307-73675c8b7969.json and https://artists.proofprofile.net/proofs/artist/5aa74ca6-ebed-4908-8307-73675c8b7969.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 0x1a0e1979ad99f2393a5a6f507ac57549dc7729c8219725e31c7324d369efd845. 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/QZNWP2451127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fbef33787fbb6142c3f2742e3afa9e66137d59a4fe39f40d79161186fba5ef. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS632468778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be7f3e8495a2f81e0a798afb0198468cda4b39627ae86c74c6d98215a5ed2d3. 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/QZMHK2412787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9354b16354c34c8339f099c016f6b6bb87e6b7caf921830fc97dc1f85d952558. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZS672437368.
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 0xf5512d3542a7acfaeef9b738ce288928dd37886d2ae25b3663ab0b6249ea4dee. 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/USUYG1484042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7520b221df7de2356ae48a606614d2608d170a3c8bdd9d7bad8aea9dc130da20. 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/USUYG1452610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74a2ffb7aadf657562da2cf1b1c4bb77bdce7cd45130d2615de78f5ed69abd7. 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/USUYG1440021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde677e8fe8eb5ad99d679828b8527ee79b55f85f2a8bc49fa5b64019ca5cf58. 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/QZHNA2146049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e5eadeb312dc3db4bbd276b780e0eaf9679d16a64d2dcbd80eaa8aa851f285. 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/QZHN71912080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b929ef0659f6ffb3e532ec00cec7e8d6c498a8026b366c984b0984d90e9a0f. 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/QZNJX2041589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0a09c277de049bae7ede36101bc3b0823f3b163a8cd97ff3c51ca9f41309a1. 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/QZNJX2041590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3c81074eba22411f44bfc6c0ba745111f9545e4d44d680bd2c95eab01f473b. 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/QZNJX2041592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e6019c26f16be933b07a6b508ca8251cd0d40be9a8cc33055a94dc0d6e66d1. 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/QZMHL2249093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94340678c30d74f46019323f4b6b4704c59136fe9cb0929752298a2f3ffd20c0. 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/QZKDK2131088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0fef5705acf6b30d63c78f2dfd7577564c003ecacbaf0df230a39ab7d0765b. 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/QZMHK2029347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a863c3540496b1f5016e17f32a1d15b21709e08d192cac16c05cb0b77243b82. 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/QM42K1945609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1de55c3f3191d6dc56f3ae0ab45eefbe67b75991848e85cd288b3726fb2b47. 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/QZKDK2235365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcf8d650d7942f87ca2bff1c05942bf5f8bc13bb60a9611c9a6038d9a5925d2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZMHP2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ad737d293cea938086cd3b986932552182a3782bf3af41d691aa8da5da5fc. 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/QZMHP2045828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e3648a2b7316878a84250aca6bcaf649c2e3261a60f7ca43bcca1948128df. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM42K1951762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a30aaa6ac16e5c5215ab58d59ec26292a35563d38bdad46053fb81319f62ee. 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/QM42K1999096.