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 0xeaa1947a7e78cbdd1c2661f2925c34f18f106076db619702302396638409045e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51307861-3087-4569-8e4c-efc252b8ce1a.json and https://artists.proofprofile.net/proofs/artist/51307861-3087-4569-8e4c-efc252b8ce1a.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 0xfa9b1c985e8733f01e1d6bea63dd86190964eaeb6c0e9c90885a4c9fc200fd68. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4DW1796346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922d1b2f872125ffeab8f8a9839cfed3b4e0e31eaa9ff1f428f90dccf991475. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBWMY2210330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922d1b2f872125ffeab8f8a9839cfed3b4e0e31eaa9ff1f428f90dccf991475. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBWMY2210330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da272811a01b5d0643dd3061f0f8914e6bf3deae9c55067ee66173f665531b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBWMY2252210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe990e2d71ed0ea46f5f3a1e2fd3630481741d832d403d5652051b4017a5aebb7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKW3Z2401473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1970f871e3734eccabbc0864f96b0763c022e9ba0e6a9e40bf4ed44d0087dc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USXG92400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d4a8eb39e186aa4715cf45dfc5bd659ce916e658718a0be8cd9e553fac3da9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USXG92400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a5e501a6ea401d4dd79e6149032153e3ea2b6159ea83637bbd6a975f494d1f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USXG92400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933b5ba35505f9d337bcb7d3b7d8a579ff44794eca8db6587568378284053099. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USXG92500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88237ce4f82609edf2519eac44575321e10c3e66489c9c5c517f7f4adb51f0af. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USXG92500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a2da7d5316693ff2b913695d512fe94dde054b5695451977e49a3ca536343d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USXG92500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d37d4f8beec38c45d3bcff39c8d109e6922788f55c2a12c7dc76c60615cf563. 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/USXG92500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf1735523ad3dffa67933a263f41fb34ed66291b4d498456e17c6abceff5ae2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USXG92500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3460e9c8b61d7e85dff248ad3779cec6f20590c0b1321560aa0780fc87e55. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USXG92500620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70540c6af74da989c2fb5891104f46d4a138af4a53f1483552c16a6d28ef0331. 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/GBWMY2050830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab2f85e8147e3b8cd8c6388e4ba14a4abfd211dd0d67e28188febf5de7986d8. 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/QM24S2308606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259230d0ce361144c8319dd88c06d869d9d624cf71b49a45099bbaa212286fbd. 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/QM24S2307194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259230d0ce361144c8319dd88c06d869d9d624cf71b49a45099bbaa212286fbd. 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/QM24S2307194.