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 0xe5c63629d77ed035bbc14a3b76ada9d55ed9f6cf76e5e8ce5f1bb20c5edc8303. 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/e2a701c9-1919-4858-b695-978e12304678.json and https://artists.proofprofile.net/proofs/artist/e2a701c9-1919-4858-b695-978e12304678.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 0x8c23eba6f90de74c96dde8d91af2c000389c075217b2dfd6d3746bdbab4f0d6f. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/DGA0P2421860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc67f98360d7b15cbf9ce2a200022fa985ebd659d81e91e6ed244aeeac43c41. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/DGA0P2421861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb63c41b5e90ebc44c15f2d2990a965ec350452fafb9c5d604f146777cf4cba. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR2X42596959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7414adf1c7fbcd1a648849f516ddec4b4aa2b44e7475f9c5524d84ce62596ad2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:05Z), 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/FR2X42585984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d26372b8d3c0299eab279d5d0ace76e5ffe0e2075450022bbde5d6fdbd654c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR59R2574307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91aeee6608d2ce6be6f495656f793991cb57b4ec9e9d2438200a5fba18acb2c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR59R2574332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a84b2af4d1009e54d527b1fce3837b3cdf8ddb219f3509b939f596e84f7451f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FR59R2574333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efebfc4201f3c78b8fad0da5b1584f71fe279ded73588bf04761b768b313b46. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:45Z), 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/FR59R2574330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5044628dcac67ee58a4d5b5e8e612e5c4bd675cebcc1d128ca528ab6c208c07. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR59R2593074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8472bf2f685c57e09d6936bf7542ae70efde6f7e42c1e6620dfed1d1462ceac0. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:27:10Z), 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/FR59R2574334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9101eb2421ef3eb93136ebfe06ec8729405a88e9c6fc54716aa5de6224e3d6f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX202511718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb704632309e67265ea09f1ec10e6d978609eb573786798e904451a278f1ad13c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:46Z), 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/FRX202511719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80f49443730a52cf87bf5d185fb349001d0de4c4d7c3ba6ced3772675987b9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282575374.