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 0x61a01cc0aa24d24513afb435fd9f1a69d3f0414c722e7db89b805b0ad77622d3. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4413c38-b9d1-4d66-be6c-cf4e2a6c286c.json and https://artists.proofprofile.net/proofs/artist/e4413c38-b9d1-4d66-be6c-cf4e2a6c286c.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 0xe0fa28f511555178e75dd8afc56bd5dca690959f7976b0ebceefc0639d1d8e70. 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/QT3EY2459967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a48f06e22f6cfd456889a29ba8d5fc992c2f9991e3f54890d4cbe7d6b2a6bb. 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/QT3F22444755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40f753c425be0092ed46e4abd4d3c8c44d12869254ad8c3858bb3072b9b7f76. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZES62598512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f6d9d85064c03086b249baebfbe153e4b0dd4825154f1da9701de30b293794. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZES62598513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72216df32e8dc6751187fac64fe2cb0cef7cb5484bffdd37ed69e0b6b39fc27. 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/QZES62598514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467588eb92c69bbe0f9f66276e89f417f60f2f9bb98e3a4de30c28ee89267987. 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/QZES62598515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ffaf08bb9eb537d93dbbc904e5798680bde3c24dfbb0e109a22665febbd36. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82549431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb85e44480a54dbc8ce4ce272fff97e2dd306ec6bacb421b34899985ed7989. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAT2530035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ce290ac36e451414d884b94c2ebac4dc7d0e3c3c74ac58f9e5a405ee98fa2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:24Z), 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/QZTAY2572064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284d5676f0f88582b463ec5b09854057bb950fc98a462d2aeea043a6d39c1bed. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7K2589861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed79a2da28dc1199fdfa29ba41f46c62647b186669676354d995eed4400ae44. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7Q2557135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0455116c3456ee228df6661cae3a8e2a5dcf191e9e03103ef97295f9a985c865. 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/QZZ7Q2559536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3944ed65f6179fcf526dad3b6f5e4a63b4e99e08d65c1fa309931f13c6baa58. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QT3EX2584727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3122169e45b52f5a681b2fee99341376c933b3565b2862339c0902d353344adb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:54:20Z), 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/QT3F42551726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184eb85a65ad6be26c3656595b2048da6e33bce7b1f00e005d2f83f68ac13775. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F92586202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c55ba0b5c787a8bc629dedccb26c05434e3d8ae7ba74a6583903abcb3dd2d3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT3FF2500611.