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 0x4185a96e266c4a26e1f85cade1df1f047b4c9aa268ab57f0ae19652c272b7ed4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a87d1b5c-d803-4f2e-aa8c-de0f3e08ccc8.json and https://artists.proofprofile.net/proofs/artist/a87d1b5c-d803-4f2e-aa8c-de0f3e08ccc8.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 0xbfb6eb9f0759486382b878aa67f0cdf819bc95e03a94aad5ebed98b3e17e38dc. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:28:46Z), 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/AEA0D1966238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1591da33bc0159858e4b6ca7e29c853478ef2cb1a1f6e199f692f582880c2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:18Z), 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/QM42K2071214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d7528732c32346623805b92ede055646031e2ea2cdd98ca36a22576ed707d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMHK2081072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676cb8810ce63c3eafd97216a52d38c4cbc86a242bfef50c70cbb97083f8ec48. 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/DEH742157617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9898759d4ec5958f5d8d32a3faabb6be9dca89efec817fa522a1488927487d3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEH742157618.
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 0x5d19f080bb70bcf496c745147740762efd77db2fada3230fb9dc8efbd914b1b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMHN2051245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590d547f7c8c9a06d2a84ba4d7dafa947da71570b3e7ab7623676201aea536c7. 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/QZMHM2036458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3421cdb5adb22c14c499a43ef5a16ba8f3f9b2e614b8759fcfb308ebaa4d58. 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/GBKQU2184926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fb8902939a9e92d16e46e80a182593d7540827200d28194a4fa1dec3825d52. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:00:13Z), 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/DEH742224405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f0d2d194d96588e6ff4a6b07cf67024f35cfd47493a89cec46920025f6672b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU2295135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe23c64ccdcff21399333aa44215bfcfd32af73f44415a71a96d5d2aa186d7c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BCX4V2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12b15ff01b28788e00fa5c257ad2919df3c450ae6967d10dad8314c57da30d3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEH742225742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11224ba417b33db284952d49a423dcd8eb71fcf3c82ebea7d9ccb6a76508db9f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USLZJ2317761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85fd5daca1e7bc8cd1eb31e701fddd99f2697190e27777bc5e378762a8a5e4b. 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/GBKQU2380216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ab1e13640667d05db825d5c4058e0f6a9757de76d4ed9ed1bc6d3494925ce6. 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/BXIED2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5eeefcf710860009c7071ed04c71630b6fb05469410ea2b18476575f06e39. 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/DEH742400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a1f8e12250293c53c4546f27cc0629b0e9fb079bbd9d3da7ee05fd5290dd5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKQU2452753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b5b9f628c646ca59f2b3605e5e4383066a5d5f7b0bf43f482e41f1c37b5b2. 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/BRUM72401179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc653ca3d38ee3b3cdadbd0b6edb0e353bc2a22677515e0c8631e81e7825304c3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BRUM72401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85297179200d884194672c0a683c8dd0693cd9ce7bdcb12a1b0bbd3a2cc71cb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:27:41Z), 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/GBKQU2508358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a45e1eeb5b37053d9a9c141b7003c8ea50d4204d14e2b4f5b8478c1c1eb6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL1ZN2503578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3421cdb5adb22c14c499a43ef5a16ba8f3f9b2e614b8759fcfb308ebaa4d58. 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/GBKQU2184926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd136751cb511ad4377194a59aa1310ebcada31189f985512041eb67c8e3a3. 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/GBLV62008038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d911ab450fd7cfa87add0e6a3fc607ba718fc7eda964809b1d54adfadc3602. 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/AEA0D2141405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b7f386adbaffcdc8c80aa805bf305d2a582f8d779c7067b2f15f6002702e1. 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/BRUM72202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204a093c49afda4a703edea09c8444afcbdcf57496bc5e2f453e306c9ebf3d0. 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/BXHBP1900940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204a093c49afda4a703edea09c8444afcbdcf57496bc5e2f453e306c9ebf3d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:35:50Z), 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/BXHBP1900940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbdc532a67df0812b776bb2e387a6645663f577d03624048eeffbdf8dc98331. 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/GBKQU2205324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271460c4996155722093981202f8c944c1fad9124f1cfde160467924cb9b027c. 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/QZ5FN2082294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4730574b569dea51d4524a2a575cb8e2aa04b277fc7d7e9dd061da9fb923a01f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2102026.