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 0x6c3a8728a06befff2b9e42f98a9e19ff2179c64be9f7a3ae93e90f04933b5c9d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa83b385-5209-4322-a765-2c8f0fa4426c.json and https://artists.proofprofile.net/proofs/artist/fa83b385-5209-4322-a765-2c8f0fa4426c.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 0x790d3090f12badff6d3a6d4c8b7628b7e234462bceaa77adfb94d25ff835b3e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES6491731801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28e1ab62fda23a3e57a479c36f68eb9e04a3af79d9df48861e63e1b0741175e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6491731802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e85980ed2481c2feb60c93f220ba37959127a3d582e3b00ed675b149c63787. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6491731805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70ecababa1121638d377455e786a87c78bebf2151cd2af23835fc21914e0556. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6491731806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c9f106f171a84d2d199c6c1231b418ea3e0d490f340f399bd24eecfc1dee6f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES6491731807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfef2a52d9f6b773f242d069272f6e5558948fbbdc6e8f3ec1f4013856c5b43. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6491731808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807958f1da0bfe228b4afcb41902135f6523b451b7c9976cbb23f546d03454e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6491731809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ed947ad218c72250ed2fa59d970db111ca6e8260228cfddb57f2be8efb2a51. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES6491731803.
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 0x09797b9d2e53f7d054068dbf1569e07d153f842cc448647a4a9c581cc2d04492. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES6491731804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8704c7f4cdeb1115c2d22e92571d03d48344c4a8886dd9a02ff8208b6d4da82. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES6491731810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e107324d26ee93853a55d6cdf8e09ecd3fc1078833c7583647a084376951148. 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/ES6491629201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a8a33380b0c776b21c42300af2022cc7c0cd6e10169d1f1d3fd3735f8a3c1c. 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/ES6491629202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e7ee6545a3e8a316655c0745605d088c42375a0da8f14c463578ac72e2dfae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6491629203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e2def60f3f276c52f2f950e31d3d90cc3a47daaa5574841dc8908d25d9ffc1. 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/ES6491629204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5885afc1371e00ef77cf0557f63ca5508e9e65915f5a57afbe85f7369e8bb463. 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/ES6491629205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3adbc2af387133ed3281a970d5c027c9660f81b0bc5d0763b2c9beee77e0966. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES6491629206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc387f045dccf44a341a4491f468b870678a226ea27d13b78aae03a86d2cd6732. 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/ES6491629207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80faf8b91d2edbe90cb54a1c0e61fb52391788d05daa00e33e15a4b2a29d2717. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES6491629208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43722c8cebdf2e74c5a66f50ab532b1088652b4e8c93e612d708be0a71ac63bd. 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/ES6491629209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb865401cd38ecc94485c63e4a28883be98b0e46dcbb00912e9828e4f885c4b44. 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/ES6491629210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e3ba1974c2438fe5deeea59eb7a55cdec213a66bf5f981f7db393ece411d3. 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/ES6491629212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dd03af06c39f77f7cc17d15dcb3e82afe9a54f78a9f82cad0d15fd015aa180. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES6491629211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca9ec3c7e8e55631d135e6c8fea1477213451fbe5c6a5fa8736a65b33d7c942. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ES6491629213.