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 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 0xbb5b9124d0641fdb6e34c2233ae4f085321315195b8c6d9ef893f0e916bec7c4. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9eacd5ec-9493-4dd0-b989-2ffc28bd978d.json and https://artists.proofprofile.net/proofs/artist/9eacd5ec-9493-4dd0-b989-2ffc28bd978d.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 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 0xc60a746e04e62fc13a8f5acee7ab4425793a9d56240eb29c3e5a3f1df66ef08a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42108283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe757a1f1284c95aa0d903bec3f7907ea004037948e614f4dd6031ef228ff7396. 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/RUAGT2459415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b3b09c78a6c54dabb319acfd5181bd10e17dcd9202e98422573e589d929a03. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/RUAGT2459417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99c8bcf0df03d7342ed09fe9a5677c7ec9095e27fb2fd45c05f8c0e264c22a. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/RUAGT2459419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0417f6ad715cb1fe79e5adab5132a8960a53a81cffe0d5b43718c43bbab273a. 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/RUAGT2459421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee765bcdd42bd85e89499c7b405a4e67523ae49b032aca57dbc64e0053131e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/RUAGT2459423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c867dca3b9505d52984056c8e514a323d60b2f485c47ad44365e5167820c8. 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/RUAGT2459425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fae758bfdef1cc311545b58e90c33e4ab00b10adbf45d6e962e5f4743016164. 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/RUAGT2459427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34b5fe0807b8860d82ec365e8eb5019ce65702088c6b173f4a0b5ac176ee122. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/RUAGT2459429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f18124bdb84bd45c1cdc166b59b0fffbe2990fc6c8da520ddd13bdeb2e3b1b3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/RUAGT2459431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ab2cd93f4098ddf504ff01565f4ce1ed69f91b7ab2bf20d0976be2ab08f11. 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/QZ5FN1964064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45ca501324f3ac22660483796fb6a5014c9386251b8207d4c73e32723df958. 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/QM6N22041420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa5c1f60404840893f0bb7e474e5d82c1c019ef77d8dd12c6b198d42b4c0374. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/RUA1D2461515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8614167de4381e440f96377cc694545e6a8889e23a161b97ccc6ee972be147. 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/TCABW1461501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1439941bc48da328bf0d33ef8d23e8beb0e01d9c58c33d2351d961fd42758a. 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/TCACJ1566718.