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 0x11e9f2d92ff87f7d295b47d1ead27634b690a208d0475392d4dd2cfe29989fed. 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/2ee2e5a3-120b-40da-be18-2a5f597cca70.json and https://artists.proofprofile.net/proofs/artist/2ee2e5a3-120b-40da-be18-2a5f597cca70.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 0xd3c6acbaada3c96a63d2915f17c01c367984bdb4f622ed327b03cb27e61d3bf2. 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/QM4TW2118493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a9de43407919cb7b0b04b37b7be9fbda14e7439fee2dfd022a94b6113dc3c1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QMDA62164121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0419293746992c5476e05dd231c884a40a4edfa2613a69060e9d3e139e30e306. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES65E2100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20b3e10ec71bc72a2c2be47ed49deefeb81b069cb92153d80f87c286e0a33c0. 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/ES64E2201775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae90672bb511e1c0f8045795241f44a4406c39152783bebb9507ae19fb0013f. 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/ES64E2206203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc584c2981460c21b334468a4921b65e27354492794dfeecdd05db3dadbfc98c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES64E2303574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29953aa1b363db7ee74f82b3b26c208fb3f6cc81fd41de8f3a6d0426ee8b859a. 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/ES64E2306974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf713102761f176add0b0f9482341e4b34d044996ec582ee43b31d05564d9ad5. 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/ES64E2315440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c42ca3ae74aed970f9495125a8b008830d85201cedfcfca15d3f880cd870904. 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/ES64E2448645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e70e4e7002f7bda0b83688e255e18196cc5f1901d30d44ebc569ab40246dbb. 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/ES64E2462377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72705e4e2ae94b52e1c8676d686df5e176351537605d82de0a1e20238286f997. 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/ES64E2473817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24aa45d6fb690d78dc24311255773f572d592cb1b4f218e560b2b82635531c7. 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/ES64E2462725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef96bbee8e206f78a76f1aa236004265cb0c25f833a30cb382e16f9c8388233. 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/ES64E2483271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56f5657e36bfb38507886bc07ee54a0f46cf389de4e478960e43ab6e5cfdd2. 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/ES64E2486044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1872e9798e839cb2126f3b421eabcb3432faff9978e8a5cde51cd36af08ccec6. 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/ES64E2492778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9726180d624a5732e33f737e6efcfdf2156b24e55478a3ebc469699578db0ec6. 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/ES64E2499504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3172b79df8b6ec74979e29b055919cc3bc0c9dcd15c853fa24acb3df4c96efa4. 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/ES64E2506939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86bb549cae37f943d049f310718198c6e6ba9ae3df87b635344f15bb1f0724d. 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/ES64E2200824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d5ca39f098a8e831cb0f2101f17ee5d8cb8cbd274eadb9229307a711afc4d. 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/ES65E2100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6479a26291b1ee265326ee2edf6ccee62abd18c3aea08f9e431c406347825ad5. 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/ES64E2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845b5be5de0f4741e30b53044b9d13b9b5e0befa7c28bc2fec0063b678913587. 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/ES64E2505937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e552392f00a8acf3dc73fb49d4837c459c0b98ca609b08f381221cd59f89c37. 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/ES64E2503529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1221efc14362ce294c686ecd806c8326fc7505c0dd31a02c4bb8aba6701702. 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/ES64E2471244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ae4c101a701343eb24853d5a5efd94b45cb35ad0d7d57569a080657481234b. 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/QMDA62108807.