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 0xfe1013966bf1c78c1c5e5f2ac7096f2ccc7c199bc5203591b426b482c1512dd7. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d99fa39e-f2c4-4557-9cee-67962cc48e84.json and https://artists.proofprofile.net/proofs/artist/d99fa39e-f2c4-4557-9cee-67962cc48e84.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 0xac1a740361948057957326ec54bb7850108a0e156711a1b7dd8fb877af20e539. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2319146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbb7083afd4e7f04ee2c33250856e06f58b56fa6a051fca288d75bc16d7b170. 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/QZG2X2411498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7594a38b1ddd099435a8d5d7a587e506c129785b27724247d4519753c01f935. 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/QZG2X2411501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec8934432e577dc1332fb10ae318f4d3f0d6bee80151f3ebb7ed3aca079e806. 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/QZG2X2411502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b943fa095a4a1f373e2cc82165ce24e53d077d9024abf1f4725cee836a8839. 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/QZG2X2411515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4942659b4565914bd34a6bec04f1f9dab79df0eb53d60e24d4833523d54f10d2. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZG2X2411528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe284f7bc5e720e6628896d9500224d2c7355163098ddf691d0c534a3f8c4e752. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZS652357206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa275140580591e835e8c9095908178e3dd5a6b4bde53860950958df3d09db16e. 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/QZS642341977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445228dc1b5f8cd408d64ced43de6a59eabda4f733f83333c3349f39297665a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS652364480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6636a7d93be14d2e3b73b330187cac7ab46a5e87e8e071f39c280396cc81067. 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/CA5KR2427789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a80fe4d084cbf1d32251898012aca140f8a48337cec83a5342db3056802d310. 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/GBKQU2344579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf270a7f035dcb6703bcaaac9bb18dad444fb2a448f80ed47f26d8c80cb123. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM42K2586603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3661fe4d6e33ecb4ccd29ff5406caa0c6ca3f7524737019733d7b5eb3bab2b. 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/QZMHL2532927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d39bab31844c503b2cb509d40bd700de22fd1fe902f5464ed10ab4543655c3. 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/QZS632579508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef072536ce882f3816327f0a345d1e167d9c50cb027ecb588714190dafaec8d. 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/QZS632523886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a5b51a46c33405394bf126ec44c94320899b06c20a46d566dd4774b1ce953d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMHM2561905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f33a21c4b284ecc9b4eea7d9621c60f4bc69f916bfb06b7f21b63d2a6c97b06. 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/QZS632535086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bee36173b3266084a4e8f30f5457d01713c775bc0961c038cb6d808caa63f0. 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/QZMHM2503492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeef48276ecfde7ccaabb12772042d84669fb3be630e0e342b2c2ce93be03c80. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKQU2338593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd241d2ec18e901a04c7ffe086f95d45d06194e1454de1b1ec95b863ef9f753. 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/GBKQU2338599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb5403d26c480906804f17931d191f92ca7ec4825ac2a4b09391752a7d7c19. 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/GBKQU2338601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af5ef41bf7ebc8955ccba01fa27790c5b2c89e43949dfec1df0558a05340e5a. 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/QZMHM2587090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6577390371889a2f3b28a3291c8e4d13998396af19b4c868c8c12e2a3518238. 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/QZS652313187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db1f52c1d4000d6b51034a699887d65cffe691aa853c0a83c6b8cd2af48f301. 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/QZMHP2302581.
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