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 0x1a825404ec80c1e63e0bc8ad5f1b8096ac9d0f977aa31d5bfda0e3eff3c32baf. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80a4a01b-ae27-438e-9fe8-4bc12cee8f17.json and https://artists.proofprofile.net/proofs/artist/80a4a01b-ae27-438e-9fe8-4bc12cee8f17.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 0xe8110f8c21db780839612d237aef16ba2ffd3f6ebe8f34fc52a73a66b01e2a28. 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/FR96X2416052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a449a2e87bc48209dbc9eb33e76b17bd6ab61d88d9824e2ab1fc32da90f69. 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/FR96X2416056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d3279a822602a3631027ab4267379b6d40b217631bf4dfd9da5dfbb42e512. 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/FR96X2416059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e43ec5c0fd47b88b25f23b8cf629b5c8b8cbecd1124e0e611c5625bfb0dc9e. 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/FR96X2416063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096c77193a94b385023484dcfc837e3ba740fd57d353eed1e7e203fa1415ca81. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR96X2416064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bd196cb336b332de9bcf4a981878c1ad984a76b2ed27840dd2fa884418db34. 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/FR96X2425157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58c4412a5680b81227743594ff83e9dfa93ac86b0e883711d53f5fe65c7d546. 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/FR96X2425158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e3c15ae3119d1db684907053e47c174e78cd1a7fe9e14c162bab49527c4bcb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR96X2425160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18988f829cd0407122dc55a7e753c14c2b7728d824a751b60d49fd90592b581. 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/FR96X2425161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2408127995c55a05f33b75a99f3fc641703813771c5544c4ad478cd7a9a5da98. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR96X2425159.
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 0x962b6c8c16259c25e59c917726e21afb9fa93d3ce4b827dc4a0168c9137fd747. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR96X2415981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fa0cafee697dd1e35fd3b96a15a793c171df6fe1ab6b3eb501e86b0fa6201. 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/FR96X2415984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351c48dcfc9110b59cfe9261aeb23c2f25789603247df7db46e4c059f3db9c6. 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/FR96X2415987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa9f909cca24ed1ec35e932468fb781fcba1becbc45367722cdec58894b739a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FR96X2415983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3771d63f58b468ad49f6c8cc66938c0113d2653b3b938c8030c72fc56d15b5. 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/FR59R2452345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20766e0ada5f0016d6880e8266b64bc9585af024f9c91e379fe46e57563b034. 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/FR59R2452347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaca5ca88022b4efd3b341583290f1b95084264832886b9eaafb961abb8153a7. 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/FR59R2452349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67b98e8dc25ceb300d67ddf5245bf6728189abfedefbad192e4af67eaee256. 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/FR59R2451973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6c022b6ec8d1137b4572a69902dd902da8cde8460134e7b4e913a0fbcbf58d. 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/FR59R2451974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb032ac26266d79d169d29a13829617e92c0f7b6f7c17219f278a63f3f2637272. 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/FR59R2451975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e626a13c1904614017893610373e6886c1e5a0d656e091cc6e6563ccf799b. 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/FR59R2451976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb02c963137deb958aef1b6d65c89918c4172ec93e13404a90a6e9dcec01322. 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/FR59R2451972.