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 0x97199f54d6799bb6cc881799f685a64400485a6e7b1805b5c5061111f1d4fb7f. 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/946cc8e0-d06e-4bf0-9d83-69d2c81957fe.json and https://artists.proofprofile.net/proofs/artist/946cc8e0-d06e-4bf0-9d83-69d2c81957fe.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 0xb296bf3815fad08ddace0488353ebdaec2f8d0e41878574e4c9be24b6023db7d. 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/DEH742317816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201811bba49210370d1df6a43555e352d605d1c4fd3e42942f77c472f99f553. 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/DEH741505506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e11ba0d84c107b33e7b5d69c728a137a9d4ee0f77a05976ba31a972b12a8090. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEH741505513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4606afbb703e072ff82ada9db827e4c5a70bbd947195183e1a14616b44f6c. 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/DEH741505515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98deaae05256c08c18d6cc758169b10ab83d219c1c0544007f2223878161c44. 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/DEH741505514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fedb85fbfe1fc6be2dcf9b9eda388c329d38b7bd51cc739618d24749aae4b68. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEH741505507.
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 0xe08c7f41408758e6414509ddc6403e75500ca8f8988772d714807733bbad2c9b. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEH741505509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eb92fbf08bd1d7ccb37c1eb82dc39127eb47677cb3f961505209e649291eaa. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEH741505511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe213228646543444f91e6a1f05c8a141432feddcf875ee0e6154760efc3aeeae. 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/DEH741505517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c47b12912843c6a2f6d951daaa46b16e2159d4a8dedcfe756af347fc00d87b. 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/DEGD51306436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4715a44761869e10ee8461da787219906e9b788b4d8c78eeee6292411a8bcd9c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEGD51306438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad92b69ee7d1968b91a4167c1cd9c5334c90b473384840cabf33a52a295813af. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEGD51306440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77e9f30ff66d3a227fcc1d61319bb1b7a031df13d9ed9c57e680b9c61ec8e0. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEGD51306441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8da36ea174e3ec7420bcc3ef175302e4a0fee586f034604b32914d61207524b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEGD51306443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9816b4cda5113f4b74310ea857775527ae2ecef67dd7ffa507d91cff0ebfdff. 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/DEGD51306445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93412363ee3ee73b0f76ddb5811c8bbf598a09f45023f2563f6c481574a6e0d7. 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/DEH742009674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f8b85498793966081616a862838939354f7ee2765c7f1fdd2858f9f4306349. 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/DEH742002552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698299d67b6a477a920a50b3a761d914e2b2ba14d99d1d5f1175ce73e1b91711. 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/DEH741911408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b6f038392195e6cad484fbc9b4e313511b217a21962f5088d711ce9d25cb4e. 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/DEH741410300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22e9b96c3b3aa0a37fbc7884f81bd377f6435e298d8b77532aed044497d520. 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/DEH741410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ab0bb2b1b4d89ce6231a00c1576c9fe2757bd9ca7c27ed6faffbdc7796e691. 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/DEGD51406595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb94a85128f3869d61a799a525d10dc7ce1c6d33e6bbccc03c9b06e0b4cf638. 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/DEGD51406593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870f250288b672e80086e25b53ca0e0da64d662c0ab88e76df07c9db17a4ac9. 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/DEGD51206235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6058490441a23bff8c1ecb8e87dada45cd81fab7867da0e2fa52ed745cd15f7c. 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/DEGD51206236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290caa2ee39894172198f4fe1d2705c484f4b9aa51821691a739e35f21162857. 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/DEGD51206237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ab47b77cfcfe75b5dfc227c19188799cffa7e0744001d3aa8ad1774591daf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEGD51206238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dacb1b9887e85bd6d5566dd0a799b2ea5370a1940095d8185e8316c947fe2ac. 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/DEPS81100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24130729f551660fbf839bfffb16e832f4b29c21168d9f51924bcd48ec921091. 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/DEPS81100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0454a7f38aa76c9b653ef0630db8388c05acba5020d96c93f80eb7ab2e2c46. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEPS81100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ec5adcd2543fd3c0f355735f3603d7d1b6341ac95e9141466441ab45742615. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEPS81100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa2ad091ad4391af1a3d4070fcb296d5476499b20f390adb8dd3fa2ea6892f2. 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/DEGD51106076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf0e4e72d13ce99de84dcd129742b969efe4037746d14a5f60ca458468f59d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEGD51106078.