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 0x3f645fba53472f371553f85ba19de4636b031872c6f39318e312d050d9baeb24. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9db0a5df-56da-46ee-b9b3-8e7378a88e1e.json and https://artists.proofprofile.net/proofs/artist/9db0a5df-56da-46ee-b9b3-8e7378a88e1e.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 0x14c8085a0117ac3fa2dc51fd86abd1cb2739f66dbdd8d0885ceaf3e64e106696. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLM1968171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2384ab58405300cce209092628dcee0ac0051a4448116c33a140b19b7d9047a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAEZ2010697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885b0a669cec5ea0eaf162858a639dce5665d17a14fae5492ad8ce1e715547f1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAFH2093142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf8a8cafbe354de75a3d59db2411f459959a3d600754b36da466fbf384a43f. 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/TCAFL2144662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e413467ba21d14a54ed51aefbcb9152fc3434b31b2eee52f7d67a2101ff9d1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAFN2191463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f53add41bf748a6c1a877c4bf01add0deb93929ca55df44989bdb66a7dc321. 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/TCAGM2280683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb88fe1ce967fb3b48cc30d057c2395e578419824dcfa6ee6b25429a9e45d20. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/TCAGP2202176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ea5e9e075dfeead5721bf08d6baad10220b12eee1f24c5a3ab034807cdb84. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:22Z), 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/TCAGR2246690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4871a1d616986555e4f84bd2a703ace1bd62d0392e1b44598b6cd3234bb371. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:18Z), 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/TCAGT2377312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7055f68e8e192b065fba9e2b34ee460251e509d5e35f2b09c638c322328dad3d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:17Z), 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/TCAGY2395339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df4b14af842a8d7ae14bd5449e3d6719c0cb55e0f288c1cc68ad86a7927f307. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHS2319559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfaff94451c2145df6b09f1959525c70bd3ee97a5c065184c424d8d00cb910d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAHY2487743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa769a18a5e2cb7661c2769aac1075b85a04e07d0dd5256e6ba0ef8d3cf106fdf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJC2458662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bd902d93c4d1ed9a8eb80dfa7105676f57acdf8bb0d9aafcd4fd4779753a4. 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/TCAJQ2570297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685fed05f0dbd52f7592664166f5464829623182bd0a4d20ee71b38304e7aef7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJS2571986.