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 0x424464c24b7a9b65b9e265e23e1c09cd6c5e45fb32550fbf94af920e4050abbf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddc86f91-3d48-4da3-8bdc-c731fb1e6d90.json and https://artists.proofprofile.net/proofs/artist/ddc86f91-3d48-4da3-8bdc-c731fb1e6d90.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 0x34dcc4784cd8217950318b5e9c1cabd07f3cd05ef1dcf733f38533bb58d064af. 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/HKG731653344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a56911691e45aa4b397800d24f2203898822591e8d12d8799e6a8df48d2bb. 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/HKG732276146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f6216509ef3ff036baf8eb3b9e69370b8f79efcb7628eaddefbeefb5241e33. 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/HKG732422552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d2e4cd554a7287c2d800bdd22857929de1df53e5bf7a9318d190ed85bdd7ee. 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/HKG732317856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7dc8ef3934d9056201fecb1511744361900df8c6212510bd6a6624b0963181. 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/HKG732250596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9a78742ef94a9e51b289cede8307fe4e68b0c04ef7058305cc5bc0f3ae209. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/HKG732250595.
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 0x0004496de8e92c8886d1179545471bb8f394c833249a1642606fd6e8bbdc531f. 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/FRX872193339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604a727ee3c75f215c2b83a559a9616d0bd82e46277fbe0293dfaa7a67ae95d7. 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/HKE022217262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f6d881767746ece3a3a217cd8d3a230ba6f9329e083d1c37e3394f8a2daa7e. 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/TWDL72105416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762db83fbc7e7f111de068a1e183b49ce8c766e464e0dbd3d6ad2b3889da1e20. 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/FRX452006709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989f90f4954ecb505cbec66022ab2d270f83e1ca5354be0319fe44332d0ef3b7. 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/HKG731902281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338e50d3eeca018bc59b180fa68b9bfd3ad1c883e37dd4a758ae7445394018ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:06Z), 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/HKG731901457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3a85d2890c9307fa543d547021cb51ca74de81a1c1a01007c6ab78e3d2213. 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/HKG731901459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2034e3eddd05efc6d78e5d3e5ff23a1dc3257527f13451cf5c2106fcc92443fb. 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/HKG731901455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e154fb1b187881985539665cf1e467dbebfb3e5bac813d811ef8bea2a6d194. 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/HKG731901452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa475c938854b6c32b4ce417728ba879c1ca8b1d42f80ced52e8293a86ad3da2a. 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/HKG731901454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5112007331b07005820e05529a8c025de73906003c4674125a118b3ca46c69eb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKG731901453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5103e2dd89f09cbc3e165bee7a1f7d310d8e0f01bbb159b8f25590787bf903. 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/HKG731800832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08acbb368434f6e285459dfde59d8e350847cd34f006eefab074c000e13d652f. 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/FRX201841427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c141b6f639e3ad31a157f8b59a4c688c9458071a52486ef0bcf9b8f9d6bea01. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FRX201841426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b841124663ad89506bc370a0336ec7a22d3638f5dac59dd5f7a0c931f4b40a. 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/FR2X41888314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09895b8431bbe6ebfa81d5158620bc65397654abee2b1b9c99bdfc8a3b7fd1a0. 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/HKD012376059.