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 0xde7220673bc9bfeecd8498b82791d5fa66afa15ac0709fbc8e79b481032c7790. 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/adbd9230-3e71-4cf3-974f-88b9ab8a71ec.json and https://artists.proofprofile.net/proofs/artist/adbd9230-3e71-4cf3-974f-88b9ab8a71ec.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 0x999649b65e3e8154c61de0621ca2c933653b542aa1a92bdc813e681ac717a39d. 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/DECE72201761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999649b65e3e8154c61de0621ca2c933653b542aa1a92bdc813e681ac717a39d. 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/DECE72201761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999649b65e3e8154c61de0621ca2c933653b542aa1a92bdc813e681ac717a39d. 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/DECE72201761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3ccd541d7e5ea7e43127f90d00af9e0952b4f794188d088b572ca28a9bf91c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DECE72202392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35defcc2012bef0165c21f827bb61db389e02262a28ae2875c70a11e7122e173. 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/DEUM72308721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999649b65e3e8154c61de0621ca2c933653b542aa1a92bdc813e681ac717a39d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DECE72201761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e70418ff1a8330bc9092cd73f7a12fde075dbcc474d6b81b230d31f40c2c65. 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/DELV42200458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f85abdba6edc07460cd5f24de19c3986fca9e557cf97367bd86f02d4742e82. 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/DEQ322400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c2a57b345955b088997d2012cb3956d059c4f3147c4a31d92cee0e219a96a. 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/DEKF22400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867289228d8b84b818eac008598a063c3516d6ddce01d706006f3fce3ac9c067. 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/DEKF22400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565cef99f999b579e63f887fca8e22d89038e92a2871c69dc8a30762e19a15b5. 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/DEKF22400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d6974c371833efb5e30376f7cb4b918ee6a7adc2614dc5d1b5297698b036c8. 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/DEKF22400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2e6fc28f2457c8bc8fc9b49641419b86766382363509b1674102f8ce61b75. 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/DEKF22301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee4777449450652e205c6b2f7d40f2e9e47ab21423dc39139c458d9bc575b9. 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/DEKF22400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c51d45d0f5ec04ae0e5407beb02a951ba975a64864d2cb4f581b98286492bb. 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/DEKF22400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a50be4cdc0c562d8cd4e5e6d99887b9030521c54e29b61fcccb6ee3c8c79e. 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/DEKF22400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca633282928b7fb29d9d74f2daa6ef3b24f897843e566390cd4cee2859feb7. 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/DEKF22301074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0be301d2f40861a5ba245d0728b16bb6b8296676600132b9144672a913dad3. 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/DEKF22400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c2a57b345955b088997d2012cb3956d059c4f3147c4a31d92cee0e219a96a. 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/DEKF22400087.