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 0x375e9fe89e5a9679ec59b540c84d5bd49051fdb55f441390f26f18f9f3a5f46d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93c112f0-5559-4222-a28a-6f438b30faed.json and https://artists.proofprofile.net/proofs/artist/93c112f0-5559-4222-a28a-6f438b30faed.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 0x218113d2c3235a91a8e9754f09f8fe1ba403cc9fd428dbe82a9759dcc25e1430. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BEA952219701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13df55664451740327f4912096eb2dd2b452cad83feb0445c19e984fd5c00f8. 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/BEA952219706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1e751370e4aa5b3269f88eaa2c3e6f1219563f22a4181cc027d436174bbd55. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BEA952219702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b478df4d8b4e0fbddf5daf0d5beef6b3add597ae35957f59123217d9a9a259. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/BEA952219703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2fdb0737c9c97fd1c46d5968fb3f95779a058c6dd2c5aabd3c6e9292ecd836. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BEA952219704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ef32c82d6879730b698dc2123d3b1fa80a0998f2e28202170004b0489157d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BEA952219705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426fe63a8eea03adfc58192eca410820e9fb895ea831db3e6529e5933cd99296. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BEA952219707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f82e09fe30b7d16dff775ad13d8236fd8636bb3b5376f873c5f30e824a48e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BEA952219708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cf9776c208da93eff2681905297498f484cd9b8b1f14da88683005de5601c4. 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/BEIB71900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f23fc108d93da2c8a628fa3e59cdb1fb9e85dce98cb00ac28d3d6e830f1bf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BEIB71900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7baaa36baaaaecae1223d3080559fff8c82b1558b11d78216e74ee4eff0cfd5. 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/BEIB71900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c81a09b35bcf811d81d4663fbc0d6ec514f0baf3334283024f097f060618a2. 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/BEIB71900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b488dd60c58524bbbcd41e3dc5e8719533332053d6826bc6204d6d19da0c21e. 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/BEIB71900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6c45e613e9242fb19c64c3960c568dc8fbed0c537e60f765a0fdec24a9d5d9. 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/BEIB71900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ebefc4a8c6a7606b0b24ae20b258b5cf9ab9dc24eb8a3ad158b86dd4e38cd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BEIB71900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c41b3b7d51a76afe5efa9f198dd0bb7c6a2f1ababad8a8db13a443256ea29. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/BEIB71900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e99a51fc7ef2e2ebae3457286d26daf1985693c08759af8b6357b5996f0d30. 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/BEIB71900009.