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 0x4320ca80b40140c0719b30254ca15088ae6e3edc52a170109e8446db1654bf24. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b4276be-eb80-4bce-a5a4-c21e1d904a3e.json and https://artists.proofprofile.net/proofs/artist/2b4276be-eb80-4bce-a5a4-c21e1d904a3e.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 0x27bb7a488bd170425add745176697752abce095f6126f4aea9578dd83c8816ab. 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/USHMD1017802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5b6f78bec9b1c4dc429787819a8bf3b673954ed4f20e578aed374a313043b. 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/USHM80907944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe9d61ad0916f40ff9cd00c90e347cb88e739c0c36f3429a36b2fb29179cc5. 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/USHM80907945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441b9a9e7fa255b068dc3fb3cd30bd3b1210361ca993295640e5cd591322ef8. 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/USHM80907946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980a55a607c2e67d8c0ad11e384dcda88c1f80c25aba28fd1e5f73656f2837ee. 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/QZARB1825895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae37398298d4ba119b48fa118ae050c3338d5fb074c52db166023d6a20e28e0. 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/QZARB1825897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb2b1c0f60d88e13a48c36b1a65bba45549e9eda4740ae5071744cd73634b95. 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/QZARB1825898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ac44c05881ac2a8e1a22c3d064d43bd95d0312a7848b169f4b3bed230f687. 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/QZARB1825899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd7e38807597adefdcd5217f7e4b2718ec1d6074e936985d1c95ff1d9d27d29. 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/QZTB72258169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51bd74f1c61940a7f860cd78b5cf5e598efed37be53d027aca1ff7c5fe3c0a. 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/DENQ81500839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca29208dacf07d4513cac1a6fe0b794c241fcff9bb119e9280c4dfe3f271ba11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DENQ81500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb8b7a3f1b99617a9eb87460a25e4bccd7f571b4f38d3d0172283ee00afda2. 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/DENQ81500841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167c6f5d89ccfde8ee40ecd802683da1ab476471e0c66237e8ea1f300bb1d43f. 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/DENQ81500843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8038e0a89f7caf156f5aad29a8f3582ac27c6337a7e74aa7770f5dca30b3256c. 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/DENQ81500844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcebb3fc7873d4294a193ba5d2b187876d57f09dddf70595df04137c50a0a48. 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/DENQ81500846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72bbdc5ea38ff166798e955e7ba40d376eaaff7b799e5037a8320fcf5cc595c. 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/QMFME1518811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff035c340dec69c7c7829837ef9defd14a87fd7d72c0f3d5ce4832caed7bdfbc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMFME1518812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35249be0b21f7dede2b501acd032eb7793ed0d55e1376d5e634494ba82f1c9fb. 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/QMFME1518820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f66eae663c61a87a6d4aaa6146e08860dcc18baed60c340f0544e236467e57. 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/QZK6M2567912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44514b01db8716672347c1cfd81b5e12f55995de875d5d54633b21b3095ec2. 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/QZHN82574471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f66eae663c61a87a6d4aaa6146e08860dcc18baed60c340f0544e236467e57. 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/QZK6M2567912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44514b01db8716672347c1cfd81b5e12f55995de875d5d54633b21b3095ec2. 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/QZHN82574471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44514b01db8716672347c1cfd81b5e12f55995de875d5d54633b21b3095ec2. 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/QZHN82574471.