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 0x6da98388a95740a29a478de594668571fdc05ad9dc3f5c23f09e504c56800ee2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8643c12-02a0-4698-806f-ac1c8178666e.json and https://artists.proofprofile.net/proofs/artist/e8643c12-02a0-4698-806f-ac1c8178666e.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 0x23d9c23019721d48b75fe86149347f41acfa738fe6bb2d16a15d2c315f61353c. 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/FR59Y2313001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa542642b53edd62de507364439e88292982ccf7dc4e845fe62815bd2e250647c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR59Y2313002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89be9be7bb11dfd940733de505995f31771bbf7014a150418c7d7577e18b1029. 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/FR59Y2313003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f6da6d2f252f8b5f834369f938d23711b711845ea2db83244a300946687c70. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR59Y2313004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0438185f716d168f2c05bbb171c09b9b1ffedf35a4e1842e2af56eb1c442f6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR59Y2313005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f61f85ea72197e49a20a69415a92978a430fcaa458f8bc62530e28999c4ff. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR59Y2313006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb52a1c945d8cba2f2393b23b331544fc937cea8ed8e8502977afc17de3270. 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/FR59Y2313007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1934b925eb81e51036be18e757f482835fa938e406b69c5e930108bff2cc03. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR59Y2313008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc64e754ac9da4293fe37871d46fe0f42a9eb8f78d3dcf6f82ee64432845343. 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/FR59Y2313009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d3a1691fb6fa11cde04d82c99b370c6ec9bb797bc6f8a845a186965c4ccb62. 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/FR59Y2313010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb411af357ff0f1fb5fd76f776c589c3fcd196716879a4a990b9d94d1d4f08e87. 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/FR59Y2313011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff7a1087b4a473a43c3b332958830645840ffa661a5c8c5422af42cb3f1576. 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/FR59Y2111901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa17397080442deeedde4a0972b702291aa68baaba41356edf2d967f1baeeb76. 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/FR59Y2111902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faab66985a50f0ef2f9ca2905fa2274019ea5ac611f72d983170f2d94c31289. 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/FR59Y2111903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb35f65bcc4d5f0d9a6ca3c64b3599a5889578d83ff4dca32ba7a4161ad7333d. 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/FR59Y2111904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0a38152939e81fd9f825c3b7b1f80ef3acb194a7c1bfc0b66bbfbe35685f0d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR59Y2111905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf453bdab88def637f417c3665567c2ae3bbf129279903cff7d7bb61a930ceb9. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR59Y2111906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf0ecbf94ad91215454643a972025fab13004f8acc12a2254a458ffc35c734e. 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/FR59Y2111907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822bda766471433e31d8dffadf15e11414ee6f7afb37429aa18d9fba16d2c582. 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/FR59Y2111908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66161a71a8a2fc0d93e56f76719a4f626b7ecb2daa12397b16778f8680c10b7f. 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/FR59Y2111909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a77737b598aac1b5066445e274f3e0472a73d99f982fb70d64a7ba06b5a32c0. 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/FR59Y2111910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a1326c499a46c16a7613a2b2802d279eb6b45ae210e5540dd83b91b253892. 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/FR59Y2111911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d8b493a10f5e63bea8006721efe1576d815f82b99685076bb93d792cc3ef0f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR59Y2111912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e5cebfa99c5c87b8bd7108029d722589dbc767170698f4850c4e56d263cab1. 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/FR59Y2212301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2897f65ca0e3af2d4a42c56fbe1581f5b6d82fa37f605a9c7c3d7ee263c14a. 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/FR59Y2212306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5e0d252671a39ea456657790e4c74b25cf5154f55170e0d091ec7573d6ffa. 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/FR59Y2212302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff7a1087b4a473a43c3b332958830645840ffa661a5c8c5422af42cb3f1576. 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/FR59Y2111901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff7a1087b4a473a43c3b332958830645840ffa661a5c8c5422af42cb3f1576. 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/FR59Y2111901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf453bdab88def637f417c3665567c2ae3bbf129279903cff7d7bb61a930ceb9. 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/FR59Y2111906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822bda766471433e31d8dffadf15e11414ee6f7afb37429aa18d9fba16d2c582. 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/FR59Y2111908.