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 0x25543b088dec5d07dea6f681f1afa5322913b67b2965d294001c6616f46aafa9. 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/b9873746-f32c-4b8d-a382-c60128a8e453.json and https://artists.proofprofile.net/proofs/artist/b9873746-f32c-4b8d-a382-c60128a8e453.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 0xd355398594c0179e42bfe331abe5cfb8232ff9dbed2b485aace496025f9087cc. 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/GB2LD2410225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d934300f720ad4a5d26411b32365ccde7a1414253be9f4c2ffe1c6a2952ff05. 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/GB5KW2201785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3ecb3a233ae22843660bc032005425ff1cbf880fb5611fdc4a45c05a6dd046. 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/GB5KW2304608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec2984594cf0c2537b25248e29fedcca7ba96016674802c4a56a79c20dc2224. 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/GB5KW2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0db70b2eced3506a6b157be2df5591494ef5d6e974b370b4faef293fb03245. 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/GB8KE2215113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198b186b2cf1e12b0462b7776f33add89485b37488f4e3c74fdc5365fd693e96. 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/GB8KE2215114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ca129fa47d1fafc12cbb0c7305afef7fc739b075bfdfbb702a3ef664bcafe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE1859807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7412b194a2873cdf401c83a88f10358bea016faf8ae4baa8124a9dbb6bc5a5fe. 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/GB5KW2203326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a89b1755ef024f2326bf601adde93ee9eca54d370f7141701eb7664731b27a. 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/GB5KW2105084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e30a978d46757caa28c7e41c4d2ded9e73e2344c8fdd66997ab86e3c4b5a520. 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/GB5KW2105085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a717e1e3e888de8233a8f82ed0188127ee28b2f78949f383de1ed054b621bc. 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/GB5KW2103110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919b22aca937815724cf5fe949ef2df15e0b457c56e23427eb89288d97bafe8. 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/GB5KW2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc119052bf7e42e13f4d76e8335c62756b9eca76f874b02d5061d9a163c795. 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/GB5KW1900892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1f986b869a25e1f828b5d04bd53bb66b8bc63a411b08dd3157ca4c5b6f22b. 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/GB5KW2105096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc119052bf7e42e13f4d76e8335c62756b9eca76f874b02d5061d9a163c795. 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/GB5KW1900892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0db70b2eced3506a6b157be2df5591494ef5d6e974b370b4faef293fb03245. 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/GB8KE2215113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919b22aca937815724cf5fe949ef2df15e0b457c56e23427eb89288d97bafe8. 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/GB5KW2000040.