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 0x6a3900c7b742ec8f78516c04be72f5de89eef678c9eba55c8d052c6679947ea1. 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/cf4cc91d-78e8-4de6-ba39-cab3b652a516.json and https://artists.proofprofile.net/proofs/artist/cf4cc91d-78e8-4de6-ba39-cab3b652a516.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 0x96530e51872370282afcf26b3e6a13610207ca04ead6f363a915ba5fa2eed2fd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:07Z), 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/GX38U2224505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d48c3c8bd08b0202dfd91df3ee72fb000a1f35ce3a012ead3aa3238e649da08. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX38U2224506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e117f637199cde5ddec415278f19b89b1cbcdc845d8538c16a10d814f4c945b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX38U2224509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5b5f51e708d0e5a973147f7c1c1210e399ba5e0ce1ebac5f3cfbc2de11dc40. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GX8LE2232364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470a72934b72ed76fb2a8775b35f114a5e614a0696aef727b793ec4c1e194a57. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:10Z), 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/GX8LE2289327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee6f3293dd90e706f5abcbc437769acb3c3798c4a216c2d389786847caff331. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX89G2316869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da2ba34875e8d72de05cf0edcb6f8e44513b6d2154e8acfb57301a9676ee081. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:27Z), 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/GX5MY2172850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9a396eb6cc02b5af3274092ea4d11891ac8b1b2cee1b2eab710dd72840f72d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:01Z), 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/GX5MY2172851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f68686369e717c46d48064379ecbfeab8bbdf38cd802704a8e908b8a9c1a76. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:01Z), 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/GX5MY2172852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2764a4855ab6537d5920e30c866ffdff04a374426f4451d38e07c7ec32c8652. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:07:11Z), 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/GX5MY2172856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6772a0ceee9c06544e62ba4688a34db14f904a79d0f667c9a0227642bdbd1b8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:10Z), 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/GX5MY2172858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae291370bb59dd007c07e66063b0f6415d2cc62b095813eb0ef277c2618a5d1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GX5MX2261004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32b2d875a659743ba5c4c253fc2658e5e43e61cfd4ee27b36a380c093f7d4ca. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX5MX2261005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c42286c46221bee7291fad8bee119dc2b23670c5cef414f693460bd79858d5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GX5MY2396555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c4a78a8838c16b3439dac9542545dbf03bc6aeb51b869c42491c69c1bd0d0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:35Z), 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/GXBDT2550126.