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 0x65725a8a1ffb543de12805f48bff9cc1a426de044f0b3d9de864e1ef3a50419b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e572c316-3bee-4f53-b189-bec26ea24c91.json and https://artists.proofprofile.net/proofs/artist/e572c316-3bee-4f53-b189-bec26ea24c91.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 0x5e5b894ad4540fa9257cd4b7df2727fe64e6aff3866584db14c48c3f6ad148df. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1905103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55da340a369b456805b4ba5a478d20b0cbdcd82392119b6a66fd34dbffe60ca. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6DC1905105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce685ae2cb5f1e55a724b554923d3d2ccb7d2ec8a6f3894557c5270420af80. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6DC1905107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b714442b863283efa08ae5ccd22422c0c8a7c6ded078c380b5a6c74ecd96c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM6DC1905109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87147c78e3c06f8874403c38f00ebf8b13ac768828818a0d9c7b5a6b3407004d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6DC1905110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b894ad4540fa9257cd4b7df2727fe64e6aff3866584db14c48c3f6ad148df. 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/QM6DC1905103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55da340a369b456805b4ba5a478d20b0cbdcd82392119b6a66fd34dbffe60ca. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1905105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b714442b863283efa08ae5ccd22422c0c8a7c6ded078c380b5a6c74ecd96c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6DC1905109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87147c78e3c06f8874403c38f00ebf8b13ac768828818a0d9c7b5a6b3407004d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:15:16Z), 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/QM6DC1905110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f58cc7e417b1abadf18538a8fdb812a5ef1b5246f50734b9eb02170906a01fc. 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/QM6DC1905111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536ea9eaf04bc16efc29ea8620b2d224b68f8bcdc569c5f806a48e301438ecdf. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM6DC1968414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc29edce4d0dbfbf8c5a18add0799a858f418f54f87d3e4152ba4984d28ef0f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6DC1968417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc29edce4d0dbfbf8c5a18add0799a858f418f54f87d3e4152ba4984d28ef0f0. 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/QM6DC1968417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a70c9bafb1ef89845bf7d9ea74b707c2959f5dc41f5d36f80d3e7a75dbe554b. 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/QM6DC2072682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035933f123e58a5226c6052e081da702ba6d178b29c8f9f06fad9c7e9860740. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6DC2087518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035933f123e58a5226c6052e081da702ba6d178b29c8f9f06fad9c7e9860740. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC2087518.