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 0x97ade2a537954d3ad03e79021f105b563424318343aaae75558246e322a47b4c. 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/04d66602-3e74-401a-acf1-03f8f391e37e.json and https://artists.proofprofile.net/proofs/artist/04d66602-3e74-401a-acf1-03f8f391e37e.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 0x85a71dc6338877d108465bd24facfdd3b845044d39e6fc1d1c02342e35e631e8. 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/QM6MZ2405246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa685d43ac21e4c576cb8f7e32e6ad53c5e1399d5f9ec8914131b85e8b5e4a3c5. 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/QMBZ92306871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b62ee74dcc32237f543c213a6134134be0cee61146f7b129d9474584da096d. 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/QM6MZ2312423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0496b9edf5bf7cc990160d007f56e8b7252c3eda19857d98a8872637685348ef. 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/QM4TW2347354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0b1a46a9c9ae1924a061e5d5aa4ce74f71b9c984acf8b60d10d0decf252b4. 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/QM4TX2253181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6ba88cc3a77a483210b8d2c920d56acb24dd932845db82fa422e01275bdd7d. 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/QM6MZ2232575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e9aebafed0e9e8f2bcc543ad021607cae9f1e0d7e0d95a6c8d46cb9841e42. 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/QM6N22276126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb5396c6737bb450daee278af9af138d2c4381d074b4c7623337f672786adb4. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QMDA62200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b45568d8de78e68ff3d1713a40e8fc0c996bbca35d8dbd00228e2c97737bc47. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA62200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e9aebafed0e9e8f2bcc543ad021607cae9f1e0d7e0d95a6c8d46cb9841e42. 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/QM6N22276126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6ba88cc3a77a483210b8d2c920d56acb24dd932845db82fa422e01275bdd7d. 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/QM6MZ2232575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0b1a46a9c9ae1924a061e5d5aa4ce74f71b9c984acf8b60d10d0decf252b4. 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/QM4TX2253181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87848beb20e416d8096d76761e5fe2b73411368fd410183de477beaac2969d49. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BK4DA2400631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeb9cf64b2fd9332943ccaa754754f445c3ae74733d460cfbccc7e5c286bf4c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BK4DA2322029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a780fc005b86a070da36cdcf186fd18ba637d45636ab628b9cc24244b86bb98. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BK4DA2327091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca12c324e01883624f4361aaf89790ff48bda2cc273cf3820171b011dd190c66. 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/BK4DA2409754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0484105f654019e2b67af3f577e9f87321fbf9fdbb79e3b42dc0678e2fffd1c. 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/BK4DA2409753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9de50d0e87899fb6f5c1b0b2155f7737d7fdad17e885a53a18315f99230be1f. 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/BK4DA2406465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827fe8b1f1ea5e86e78c363d01c3479f8de310cce65695d70df940ce8b1b187d. 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/BK4DA2409752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c6cdad07b496609deb1906d35934c863bc9881978b0904800c5ffa9fe3cd6d. 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/BK4DA2409755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e601046ed0dcbcffb3fb3d8569789835b01a2945a247e6cc35b67c48a28c1. 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/BK4DA2409756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1ad0bf6b972af2484b54768ae211454337a07534c472f6fac5a6ca93d29153. 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/BK4DA2409757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261407083062dff334ffe79c2782e2873e7f6ead5808613927d5dbb6ede52eb3. 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/ES71G2500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ed5923625e3ef826554278a100e372ffec0e96b15daf3e17c5149c622650d8. 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/ES71G2500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d11ce7cbf04aa4dabbd6d6830e8a9c42b504fbb7b41a61e419f8c9815816f. 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/ES71G2500595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932095d8de126f46a8c1c30335fd2439db7ff9ebc25c780c0a2373f78505519. 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/ES71G2500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609195e83c5817720595f98fe6ccdd84e71c19130d353fccf986f77d8b063df. 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/ES71G2500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1479f44765289358c9bfc33aef9e4d27d0d3641182adf4364038b40f7133b4c7. 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/ES71G2500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25407c83f357619ffc3773930acd666f03d6eb9c2e1754a9d722da6570fac19f. 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/ES71G2500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447078093a15489fddba93a27fb474a98437eac183b838dd9b38e094228c2e08. 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/ES71G2500596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d49a9d111fbce95a1b3a3cf2b876fb4734fd3faa2a6f49246693f1e4119ca. 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/ES71G2500597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b46468d817357f41e05390f599206f8b4870ddf432f4fea0692f0b9c5ab80. 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/ES71G2500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bb133175ef193ab4b7b09c21e253986554c22b167ea3ddcc4faa451af54d7. 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/ES71G2500601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8fefdf84d962c83a8d05117b27c7daf2e163867b2567da2f2133963a5e4279. 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/ES71G2500600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bb133175ef193ab4b7b09c21e253986554c22b167ea3ddcc4faa451af54d7. 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/ES71G2500601.