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 0xede7c1cce91e1e790c02e6039ddf84e6c025f71e49db5a16554f925fbf96d9c4. 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/222a8087-db5f-4c93-81d4-7d3dfb6333d1.json and https://artists.proofprofile.net/proofs/artist/222a8087-db5f-4c93-81d4-7d3dfb6333d1.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 0xfa1880509c288ec04122972feef3f3d3d314b7b9f49ad204a1d964a156552aa4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DE1KY2506162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9773fcfbd5d0cae261223e24d6153651aab5fbdbaf2e16b078568f0a6cbf59. 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/DE1KY2506165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1880509c288ec04122972feef3f3d3d314b7b9f49ad204a1d964a156552aa4. 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/DE1KY2506162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8674ce3804e38779a6578f8b105abd3c10fc13a510291d0c9955448b681c9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DE1KY2506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9773fcfbd5d0cae261223e24d6153651aab5fbdbaf2e16b078568f0a6cbf59. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DE1KY2506165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8674ce3804e38779a6578f8b105abd3c10fc13a510291d0c9955448b681c9. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/DE1KY2506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2e4987a7e3e5c648a8187b9d6329b2ccc5c2684fab4c106cb54448487045. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DE1KY2506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8702165fb9bc25d67683e968e802442b23d0f5fed0d61f24dd49a59a315bb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/DE1KY2506167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8674ce3804e38779a6578f8b105abd3c10fc13a510291d0c9955448b681c9. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DE1KY2506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2e4987a7e3e5c648a8187b9d6329b2ccc5c2684fab4c106cb54448487045. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DE1KY2506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9773fcfbd5d0cae261223e24d6153651aab5fbdbaf2e16b078568f0a6cbf59. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/DE1KY2506165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8674ce3804e38779a6578f8b105abd3c10fc13a510291d0c9955448b681c9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DE1KY2506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2e4987a7e3e5c648a8187b9d6329b2ccc5c2684fab4c106cb54448487045. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DE1KY2506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9773fcfbd5d0cae261223e24d6153651aab5fbdbaf2e16b078568f0a6cbf59. 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/DE1KY2506165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1880509c288ec04122972feef3f3d3d314b7b9f49ad204a1d964a156552aa4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DE1KY2506162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa2f0e6edb3d7060bb8060e732b3e543013e6ec6556d9891166c4f93faf5978. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DE1KY2506163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8702165fb9bc25d67683e968e802442b23d0f5fed0d61f24dd49a59a315bb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DE1KY2506167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8674ce3804e38779a6578f8b105abd3c10fc13a510291d0c9955448b681c9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DE1KY2506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2e4987a7e3e5c648a8187b9d6329b2ccc5c2684fab4c106cb54448487045. 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/DE1KY2506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9773fcfbd5d0cae261223e24d6153651aab5fbdbaf2e16b078568f0a6cbf59. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DE1KY2506165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1880509c288ec04122972feef3f3d3d314b7b9f49ad204a1d964a156552aa4. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T10:33:49Z), 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/DE1KY2506162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa2f0e6edb3d7060bb8060e732b3e543013e6ec6556d9891166c4f93faf5978. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DE1KY2506163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8702165fb9bc25d67683e968e802442b23d0f5fed0d61f24dd49a59a315bb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DE1KY2506167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8674ce3804e38779a6578f8b105abd3c10fc13a510291d0c9955448b681c9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DE1KY2506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2e4987a7e3e5c648a8187b9d6329b2ccc5c2684fab4c106cb54448487045. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DE1KY2506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9773fcfbd5d0cae261223e24d6153651aab5fbdbaf2e16b078568f0a6cbf59. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DE1KY2506165.