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 0x9474cba871abdfce944e1b8775d0d4fb7e0852eb544cf9ddea012a252ced92fb. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afafc17c-0201-4bb0-8d7d-5e5aa4713232.json and https://artists.proofprofile.net/proofs/artist/afafc17c-0201-4bb0-8d7d-5e5aa4713232.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 0x0eb91c3ca472a022f69ceab8783d78d7c2ffd3a9bc85853b7342f483ab29591b. 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/CA5091800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0600e7bfe985647170401fc2a3a210e1b934f8864043c9fa96730b2d628c5418. 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/CA5091800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ac9630eae2e97fb11ad1a3540510becf9f8dea20058743dc1ee58f6fe5111. 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/CA5091800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299da41e7390776bf4e02aa6a74ab36df89deda6d36a3379c945ac47e6d49253. 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/UKEDF2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb84921d7550942c0e6e4e38c0d2b93dd4d8c34618fd95993cb207ee31f297a7. 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/UKEDF2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe369c7b157778dd26f8e5d9e8314794d23779fb0f09106c1b1f27c9cac07ca32. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKEDF2200040.
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 0x7de67a47fec372fa693a38c05639172207b16146606e0215cebdd46a90fcc718. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKEDF2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9531010224f92038b96b52db16e69eb34206360f8750f2669d99fc2cb49453. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/UKEDF2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01057b1005b4bfa7c45eaa562a008f006143d8be627f55fa5bd964f797938955. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UKEDF2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c7cb8f0fe85cb2a9969c8205673764c9785a29e2674be2ac73f60a97f9995d. 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/QZ9Y21757513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe8230ba4825c17fa657420ce3a76b87f7dea7a09bed1591dda255cb572b037. 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/GBMA22011629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f13d958bc97b1764e4811b7d2376baf5dd5f88f496190d526f5abc5c447d7e8. 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/QZDA61806190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b2c579e665e7b9a4e5659935b4022fd10c1a0acf503f0ac285742226537fcc. 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/GBKPL1937557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e988a31c59c408e0450634daa29f63cc574e5cec193c2132e9d844d6cbc254. 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/GBKPL1938549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe904f98d9f393e31b6f0adca6c57817565aeb5907e60c0838c95db9e0577bbb6. 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/GBKPL1938552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41505cd83d88411da0275c1b931d49ef474e91582921afba88ecaad844720850. 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/GBKPL1938546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31273e47cd2ef4feaa882aec911e2b175163a2fdd2ea9255141c85d8acc60a2b. 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/GBKPL1938548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd840e3e5c638058aaa1c02bed84cfcbebd0bf5ea25e41d174075344af111124f. 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/GBKPL1938550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca26801d7c6196130123aa663682b56f81a70aa0dafd5d8abeb4501479c5c73. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL1938547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb01eee032d2d8c0a6c50bd92ba476755cc4afb1fbbe17d6efe71d32f14a42. 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/GBKPL1938544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1197d35260d130efe1a027e22338a6fd91274c31dcc7d851e3dd62763efd7b2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKPL1937556.