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 0x83fa86cdee7dd0f13d31e839490fe50841fc25b15c7f6ffefc9a7e97874300ce. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef76a48e-7f3d-453b-ae53-f77d49f6314c.json and https://artists.proofprofile.net/proofs/artist/ef76a48e-7f3d-453b-ae53-f77d49f6314c.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 0xda79a1006a4eb5f8f7387a30729c7996fa7a7c6e6795e11d193476c0c78ea894. 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/GBPS81513106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9489920f5d707eb48b37315d57a730b9dabca112c64f8f122a7c3dc7de4c48. 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/GBPS81500659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001fa4a0e2fbabd7e90f437522e4f1a8bc58d02810e87b111b0fc6328fc9364. 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/US5UL1343460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba6d21aa2f3837ac316592f64dc7dfef4c5d0480e0a0b5791d433e329d76734. 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/US5UL0721334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a12cbe3b5d8015d2753fbffed1296b6da8310f744066366e8499abc33847a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US5UL1246941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa3947b457874a1f122abc1a2cf909ecc50d6671d8eb8747c865935bc3513c. 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/GBPS81500635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90363837297054cc01b413ff3ea5161fbc255268fc2b1a17e6cf10aa7fc216f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US5UL1041998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0790069234c4fce9d33989729d516e73ad99bfbbc6819cd13dc0c54e2039e28b. 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/US5UL1315549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc0a7f20d3ab8473a95390c08b1ec0b2015271f54633101cf80e46f3e95f15. 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/GBPS81513059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b1c3ea2d1a184d8dc4c6722ac4fab37d37505d36364ba04af993e337c118e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81513068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb9f126147974b3bfd48587a262f312e7da2485eddcfdbf63bbb8d978afbd1e. 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/US5UL1239887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a2d13ae61d2837b8791c95394e9f17c5d86f1e14dd690452a533a99b4ed69. 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/US5UL1207565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f3854bc4fdf415795db15a02c797b2b29ec71bcfaaac299e65447dd6bf335d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81513101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a8863c576c8f7f10661148e2a583d41b8208810cc8721034ff3abe5572ba4f. 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/US5UL1314842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255f2ada1bd2bd31908ced26fb124b1306a50ce197a6d841d0707ddad5dafa94. 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/GBPS81500690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9a94556e9d64ab5b79277d34b3007dcabd199dfa03d00e92878b6c7b2530f9. 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/US5UL1235195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba6d21aa2f3837ac316592f64dc7dfef4c5d0480e0a0b5791d433e329d76734. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US5UL0721334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c638de53df26a964762ae6b217a4ecf9def33f60defbe3bd919eed3cda2b2. 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/US5UL0693291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255f2ada1bd2bd31908ced26fb124b1306a50ce197a6d841d0707ddad5dafa94. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81500690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e36ade68602ec461855af4f3af532315c94b4aaff3ad893b3e1d5f9deff33. 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/GBPS81513051.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb573ece3f353927846a7927418dc9ee7a76f84d5a11bc3095e00af8f418fde. 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/US5UL0772290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722ae3e7393beec4f388d88f24b39e2550a3f3c18324eacaa82db75e90f499e9. 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/US5UL1021141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a7b85d4e0c646df449aadd950e327a00f64c9ee4409d1a733f64467fc32516. 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/US5UL1301243.