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 0x5a2361f383b2840bc376752b7f755344392318cb0cae51d9f2927fe5598bf6a5. 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/5da4fbd4-7f88-43eb-8039-9dc36c41c56c.json and https://artists.proofprofile.net/proofs/artist/5da4fbd4-7f88-43eb-8039-9dc36c41c56c.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 0x54756ee50cfcdff8cd021685648f7f3875e792e66f933e87221b5ce490f9fbd6. 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/NLH3L1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa9adcdff2ff45dfded8bac68a71c64b69732d7b1cc90d5cd1e0671470d9012. 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/NLH3L1500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52178cc08bfce69a24af913eba3c9031522f3422d8caf0f4ef63c2ab932ddfdd. 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/NLH3L1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c7991bf37a78d1cb361a31ab07cec26429dc8bcda355b46d86e84bf3ea010e. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NLH3L1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d574da96cf5b1134fcda06127a13f2a62554c7a2a1e652f79f6f48a00516a4b. 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/NLH3L1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfa0a7dd62ccd94b8dc7c8ef7f94ce3dab347bbe6736d1db26057fe50ae66a8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLH3L1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefc39489bdd8f5f5fa38348422d43be5c1e1e023c48b860f7afeb9c7a2ffa15. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLH3L1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5289f6eaf078e9d9582956114251f452b4573f6f138a6dd84e50b456f6b5b90d. 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/NLH3L2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f9924f0749ade081197f02898a7f3d08e238c9386c2008afed92e959a1ce2e. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/NLH3L2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cca6aa81a82fb6e2cb4020b2a8a71d6c02e09cdffb3467db587ad47f216aaf. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:57:35Z), 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/NL7VF2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76234a552679e049eae4fadd076236f81e5170d77031552c695bdb414db11f9d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NL7VF2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d35d368a2b8ee1573f67149f9f982e0c25e20d2b86a8bb3caca7bed16a72087. 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/NL7VF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7960d74136c86e6ef0a0c7f842c81f2f3aff9bca72abb3d5c144a5c082cf614. 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/NL7VF2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9245b9a33d7aa188b57053393f33f4c1a4a41f3a645d16f3ae34cfe6af5fa2cf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NL7VF2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043e0a907af0c8c10220570a21763d9629428c4ebdda0e9eb742fc620793fb27. 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/NL7VF2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf36382f84d7e73e91f19aec963433dd7b7758af392609b57a78a73329cdfc41. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:38Z), 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/NL7VF2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f50098928108db2d5dc71fd882a484966d7c13393f637d42a00a8a04858f30. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NL7VF2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7428d05fb005e8a02f10ceba745686b5bd0b5cdd7e6c93cb8c795e215870c2da. 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/NL7VF2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8334fd1470a207701836be5626fc7d4784f8f5c71176ebd00b6882ebe7b8aa. 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/NL7VF2500009.