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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63113679589aa9e07b3513debd809739446bde5de208e6b48a3d810788558cf4. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d77aac23-7700-4d00-92fb-24229a8db1e4.json and https://artists.proofprofile.net/proofs/artist/d77aac23-7700-4d00-92fb-24229a8db1e4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1832230a9dc2a5c5d37b4a6d0f7a6d0051e0f6f7de82729f4f35b41e403c2c4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/RUA3R1924256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b04133e5586278a61268ad648ca3490a6447da407843c7698e24e2c6307ae9. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZHZ52116266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d31da565658f7824801f8dd731419f05b514342af45b4b2cb6d633c3b33405a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGLM2234986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52cd41eafda3212aa2148c4af461337b5fc647e1f4c1f8cdbe5f910ef69fc72. 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/RUA1D2392563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b71d24fc814b53ff9d25e7e81121cae246015c763d4836dcfe898c9cd24b6ef. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/RUA1D2463661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa101a9231eaf7c290c2b989a18a89d34dac49f1c32fde728dc01b910b307cb23. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUA1D2529382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc8331a142dd3f3f4f736ddd9886e92f0a47b3c91f3e0eea4d6c3e171b4f359. 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/RUA1D2555566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa101a9231eaf7c290c2b989a18a89d34dac49f1c32fde728dc01b910b307cb23. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/RUA1D2529382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7ad398da5975560eb54723168915765f5cf73a2195044437b61abc508612b1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/RUAGT2547989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61158eb920cef7f5cbd615f89aabc0db3eaf30268cc5cb2f6b49411814d49c7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/RUAGT2547990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3118e2dfd823d68cd455ba1abc1b60a6973f17c114be87cb00c499635c2a34c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUAGT2547991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc8331a142dd3f3f4f736ddd9886e92f0a47b3c91f3e0eea4d6c3e171b4f359. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1D2555566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0e04e10e031b022c52d3d0b71c61054bb654687bb0d79e833f6e334c0770ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUAGT2547992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb6d09ed7201ab7bac0e1eb91c40732ff7d2a4b928f646605be10fa39a2b8dc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/RUAGT2547994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0e1d9ed5b47ae3a3315d8b47635248886707bbafd95555c2c911889a9314a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/RUA1D2432960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9d77a6f98e238ae0aa6f02280222d48d830ea4045c18e34a40dbc28d19fc96. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUAGT2547995.