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 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 0x337081933e1cdf2d0fe99e1ad08fb31c7d04a2078f0c23ee606c646d0b4b0a64. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62f742d0-a594-4a99-8962-efbb261464f9.json and https://artists.proofprofile.net/proofs/artist/62f742d0-a594-4a99-8962-efbb261464f9.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 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 0x0dcdd946ae850efb90a1b7dc406485ea1caefc51ee4f8c8ebca3ecdbd4972114. 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/US39N2300828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5100cca18984e2337cacecf2370c602b5ddf43e2adfb5cf14166f7872eaa52f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US39N2300896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0f8dc27ea5f4edbf143de6c72d9023a02bfaa7ab600e9f02330aca686f9c9f. 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/ZZOPM2225581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572cfe1f517bbb1d17301db659658867f4c912fba22648a1e7e221ae8321e364. 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/ZZOPM2239728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731091038335e6e821c59a2ce02875848e279047e068f8ab501932a76a1353c. 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/US39N2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c038f56aa2a203a6ee26da23b2d72e18d846ea336fecd6534d0ba5aac35d28f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US39N2300898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9012325b542d4dfd7edd8d61400d7ec82f94303df4957be2d3f89c330ee624f0. 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/US39N2300957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5783a00aa420d7e47d5cfc836d6332590944a3b4f692c184558869e9cdd7187a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/US39N2300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7425e511cf94ca43d648a7a6846feeacd424029240115998bc7175acf732821d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/US39N2300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffba4e3499bc9168e694429118bc2d26186ae4ec8ca21be208b3cce9fc5ba4b1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US39N2300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd214c8d163134d6817ba0d73bcab52777532ed52ea0516afb4bf54b2e22c25ad. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/US39N2300971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcabbfc011b2596688298a6244cf027968340f057921db3d85a686dda2d334c. 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/US39N2300972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413f7107efc64547b8cf25021fbe9c6b65d272b3af61050cefb641037128c66. 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/US39N2300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f9fd6bd368786ae2388d81f08ab1d012f7b47432a8380388a40cff9296efa0. 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/US39N2300974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c583f61f8efe480790440ebd0138934673f621480464feea77a5b3e3f0091c6. 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/US39N2300975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bf1d2b55a89f771543d2f044a3d2ced6b3605626a276e3e506096e826b96b3. 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/US39N2300984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1365d213bca3d195f2c2d02288f6d25ad47339ec1fc19c1ce9f7e4c58cb3b0a8. 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/UKN6K2000589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7b83e1d35da0bd778dca4652073bd5db49575d3aedae3b8b023cc7b3c4019b. 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/UKN6K2000590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f45834c097904df307b38a1b8f04962fd901158d4e9e2d488d46092f97826. 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/UKN6K2000591.