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 0x0f6ec06d3e20b8c737f582d559dbbea5586cc62c37781141a6ef614dbc44795d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09ffe00c-fe49-468e-be49-5a8ef64e5a4a.json and https://artists.proofprofile.net/proofs/artist/09ffe00c-fe49-468e-be49-5a8ef64e5a4a.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 0x5933091c1c4dcf3ce31de0d3a49b6f6ce9768d9a3fff398e3f2a44fb43ba4693. 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/QM6MZ2426131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4276a3f5548f1ee6503d45d8e6d200a2470541c3f921509b3bcf2f464e7cfbad. 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/QM6MZ2426132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555bf1a52b544fddbbf63f6644c6ca2e37e04899977a882beb4defb7be014d4f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6MZ2426133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bea4aef9e4c2eac5368b44af99086bcfb9984e4674eff2b29f70920df88f789. 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/QM6MZ2426134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0cae06645d94e548599542f6e571549424321209b98dc9b0ca9f4f6e5ece6a. 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/QM6MZ2426135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca188d9202658aa45704deb8f9606f0706c0e7a993f22f2ec788b0292c4335. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2426136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af8c09396a30ac643338e558d0b874f3f6008ae94ce5798bee9fbad980406fb. 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/QM6MZ2426138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb664b79eb1ebb63863424e7d7b071a0909ed9c1a18b88ef5e9a1fa8f7379928f. 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/QZHNA1904965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c1775734851b3466d62f3c56d61f221e06f15a1d77e1addcb66cfcf5aa81d1. 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/GBSMU2516452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3a9cd0fe03dfcf22fdf673b10105a2ee9e912bbfcbe6597f0ae44ff8e805a2. 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/GBSMU2516453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721283a099d9712bf72c1201cc8bf9d20aa9dba26b376e45bb1c89f92d69cdb5. 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/GBSMU2516454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ba0dcac04be0a4304b10ef0fef3f267a4f703e3e4e07fc9e948ef7c67fcbf7. 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/GBSMU2516455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4276a3f5548f1ee6503d45d8e6d200a2470541c3f921509b3bcf2f464e7cfbad. 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/QM6MZ2426132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5933091c1c4dcf3ce31de0d3a49b6f6ce9768d9a3fff398e3f2a44fb43ba4693. 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/QM6MZ2426131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243067479f302e8713d6ccaaa655bc39efbdb29d59932cfa610a957ba603fe3a. 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/GBSMU3783931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f17ba057764152cfc0633095bfcb7408c0b7165559ca5db1bfefb6ec13d0b54. 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/GBSMU1966283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec11f84c0bb5d98248174828f12bb615eb8e751433c2ee598f87dd3353b47566. 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/GBSMU1804700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3fa5a6da749c5058c33be8b71f990f33d4ce40e1053cb2f033f40731416a0a. 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/GBSMU1804693.