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 0x758cabe24dc8f0bf671f13ed17e1041f40c2fa6f9e96d479b567a8172a187c40. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30f11380-e821-4321-95d3-4299533e4baa.json and https://artists.proofprofile.net/proofs/artist/30f11380-e821-4321-95d3-4299533e4baa.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 0x25c1abcbc622e6f4ad51a2ea4c60289e563dad1e05b5a19b5dbf019b7e9b6606. 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/DGA0M2498864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ec7c4af1e4ad9ef91d0145cb668a6a54c606179f0934106215f5a6cd9675ff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0M2498865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e86c78c2639197be3278fae7aa3e5e5c8c07401b3e9ed717efd108130e23bec. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA0M2498866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb26b52fac0c6f9a13ded6b8df2e80c3d79ccdd89ba36447938b6916a4343d3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DGA0M2498867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca496014a2fbfd88b840b60d95684a9857daad1b3c44c0d791243fca18fcd4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DGA0M2498868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6b964d388b3a7c28516d64447e13427e7fd2741cdf7f39300f0184da1918f5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DGA0M2498869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f376cdbb4af6df6f3241afbbc1aa0107cfd08c05913e548f813483b4238b12d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DGA0M2498870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32367f4b91eb660332e101cb8393ddb9fe44274ffc30263809b851f23365623b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0M2498871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2010a1030b55e75db375247c036b722306b2911c3a9916fdd2aced9a9be1abc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0M2498872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb588bf44f42fc19df1afbbfbb17fe49241d3231fbdd3fffc3c73ed1dd270fd00. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0M2498873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e64554c09fdcdcfcfb5dbac700691c1766b7baab5b8be0fb88c183d58ea51ed. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0M2498874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c834c40a1be20604a79219965c55679f4d298f1905ad99d82c1ef36525f3627. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA0M2498875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660be86986fdc6d91031f9a5aef3f8fd3e81c6cef9e83cb0c0b165ac440bd9cc. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA0M2498877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e5677363b856dacf1a3e1e7e19dcc2da5872493bbd4d62f06fa340e7440c54. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DGA0M2498878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056eb29f1924aa781d1922f53c1594e7af349e95093473dcdb24157bb42a10a7. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DGA0M2498879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8fa203cacd274d6fc387460790ef2c36a4726137a2704901970991fe1fe6a4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DGA0M2498883.