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 0x0d34f389ab93db567f181c9ed69bdc70e60d8614ec0b7919a26f589806bac0a5. 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/9e947c83-d88a-4209-876f-7eb4ecf42438.json and https://artists.proofprofile.net/proofs/artist/9e947c83-d88a-4209-876f-7eb4ecf42438.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 0x8a98cbf21a1e81df1f48a1924a0127f50027f894bbe5e799f355aec3b7c723c2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZGLS2191442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3bc7c43b9989e687f1ed45252478cebe855c9d2bed9d71e0f911f8949b6ce2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTPX2296978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45ec8343b9fc59ca183d53c9a1d49c5afdd9bcc984158197ab7cdea79c8c20c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTPX2335551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5785b445ec5d14b7de393e5a0c5944387a31c031a19fc27c37e253243d30bf2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTVM2335564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec84a7b81ad4c805d9f82bb979065857928c79c579b2acb1ff18f72fb2b6006. 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/QZW9K2355094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b92e3bd85bf80cddd56c7f21983465bb18faa163fc6e1cc8ed760f6c48847a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2411809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffff37bee6ffa3aa63fadc7278be7c0771d2a926730861e91a825e9daf0dbdc. 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/QZNJW2465765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5c29a8f99887d7735bdff4888f4729d84061dda0a33df761d9180c5c6ae84. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9M2408654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0923fb1c87dcda21deb7295ca8feb0013a710c6954c7a8152dde323293de3577. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLM2571138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dd127cd20aa9078b0de5b733c6507e4d8463e06c0229d2437b01f5ec72d213. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZGLS2514293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a05238c6ed54303bc8e26c86e5c3cc2b04d543f6ed88a5dc2b778bc13dd4b1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGLS2552368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6050346abb7a72fb3450fd4c40e9753ea203b00b09cabea7ad3885570fbe2782. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:03Z), 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/QZGLS2579421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965d1946d446f2fd2623ce133ca6c1de0d827a5cf4dc22abf8fbb9b964265a5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMZ92546419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc09c3b4ee44f3efe0b114779b475fd264975247329d90a476f41f5cdcb5d4d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZMZ92579967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a8bb2134a675f0cbeca74ebcf5456001cea062db11c5c4d954c4ca9ec4a5e7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJX2501837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71fa06f40a26e7b65eb8c61d82fd137ab5c927d2a12137b2c4ccafcb8bfd9da. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJX2552700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33562dd84c720ec9b0b60fa84cb12324ad53be4f446f7d3c27166b06839db46d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:15:10Z), 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/QZNJX2570658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa16271ec6716b070bd71a1c362576096a9553070d0c97ed84bb9eceb74fee78. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTVM2544028.