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 0xe1e887b41bf9a9afb5c820492b33e8df64aeeb7864ee26d87cba4246f160a962. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52b1e3ae-d8f7-4360-bd0c-8b0bf3916b09.json and https://artists.proofprofile.net/proofs/artist/52b1e3ae-d8f7-4360-bd0c-8b0bf3916b09.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 0xf2e22c0ee1c7ce93ddee61c3fcc1d3cc2ed15f9dc90bec41023463e4175b4dd5. 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/TR0330907163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf688bbf6fc7c478dc08f82a16a7b8925acbabf97d451baa528f5f458cb592. 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/TR0330907166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d007ec764ef92fb6211952a48db5349caa199a2f0d092f16beb083cb0e3a59e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TR0330907167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bc4a9fc521e2d5c9f25029e6e45bf917441b0a699608efa5b586ce8d6fdcf8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TR0330907168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed46f2de6a3fbc248c3efea2184c98ced5c337dd35ab66fe9ee21ca294856cd. 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/TR0330907169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581a7377b345bc09a2daed56143ae4b663264ddaa80eb44f9096869d721f0934. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR0330907171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80744b9a6cd95be19d9457ece25cd90000dce784b2951607e3a73dab2b1423e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TR0330907174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5164902377c66295596f81d81901dc404598cb1e5a6acc16ffbd9788bbb1bb54. 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/TR0330907175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccf566ca5ddbf5642dec2e17ad831174486047292405d96b31241ad3a5b86ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0330907177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea5ebdb11040dcf21b7c7ad4b184d9a05dfcba5412267ea9ca20eb8a757bebc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TR0330907162.
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 0xfe6df187dd3bb633d33d2d0cdb5e4e4eafb13a0ebc023c260ac09aa0fdf05c16. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TR0330907164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e5582f8b031161c30b7be87a8dbc5c6572a5d46fb4488ded2df9c75e47e16f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TR0330907165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93616e55613480edd6b91767c1b29882a7270b199b656850df8730e70f0c623a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TR0330907172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b37ae99931e348d8974bf3571bbc223a77e7aec04ffcecaf2a89e64c5ca47b4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TR0330907173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5be328df923ce2939207142c24f0c0c3a237b5ed58486f94ce0885adb949174. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TR0330907178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee24dc7debd4c6ae497d255935ed35e03d50d69e10e74a597b319ba5f3c7986. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0330602971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b6d2db926f43dfc89ee4b5508a7e11cd238bc9beea66d05fc955cc705fb85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0330602967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e0ce2009a38a08737b1d8947cb800ba91cf1036f7e54c0d407ab579ad567b1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TR0330602968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78843a9171afeafe9871e8caebecf593a6fdbd694295a3e7dd86409e139a640a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TR0330602962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bf7c58948ad6b4efc5ae63736b00fda88f983836f40a314bb8614529ae1719. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TR0330602961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be4515a25867376facdbd81fbd8d251f960bbe2c28fef84a492357ba174a88e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0332313146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828ba96ea70f82cdb06361ccc60a0dbf13220b5d5a3eb295ee7ac90734855b5d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0332313155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3cb7abd04d9c31837d0d9dfddce66e85867ca359eb252a20da547f2505846f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR0332313156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c18debf30fdcc41ea05322d55ca99ca99830af8ca2795f009c05ba51dbfcca. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TR0332313143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3b08ce5b555a61b174e8473a03104146454e6cc937770d22feef3e7a097d2f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR0332313148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2977d1b56b67b2116cecc4f41b083f81797fb6c9dcba65fbcc1cfdce7ecff932. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TR0332313153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b392406dd6e79d4a17b8ad9b6c1ce02f317be1c0c8836f6700df3d0aa6dd6f0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TR0332313157.