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 0x8854b34e45cc02894811f3f1bb891a1079abf07b0bac6272878afd87e17cec59. 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/1999be0e-4e4c-4316-a904-6e6166b3e563.json and https://artists.proofprofile.net/proofs/artist/1999be0e-4e4c-4316-a904-6e6166b3e563.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 0xa9160393faf4a1cecbeefd7c823984298cbb34f2ee31c90c2e35a14303fb4249. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGJ1841699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab7c0ee630717cab8cda6f0a31654d6282ecb7ce03c6b4133dc6395c1f31847. 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/USCGJ1841700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc0c4ccde8401adda31a9dc8e764176341ef4096e7a729c1cb993bc3a7b368b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ1841704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbb6c8447c552cdf3045d6c63ad72b937075d636ab887cc2c3badb334c78ec2. 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/USCGJ1841705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b92e44e94160a7b60912e0924c58e3ec93665d54eb8bf8c8f13a499ed9338a3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BRGVR1900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ae53998c10ee84b4e4926375f4c3dbe298650921481e15b05534ab967992a3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/BRGVR1900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894336f2cfced8d23316f78729ec31305272895b59c9a8fe19aa028408d16973. 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/BRGVR1900297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384743b16115c8be71e731c0fa10d21a6bf289eacd43c7eb87c36901f3a0deb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BRGVR1900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72f910f4a506a2c06a792b2110080910716dc454c7b438e2c25f5925953aab2. 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/BRGVR1900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e02770d21b20fe4d98dd7fa2acc22439912da4c2b9237eac26e8e68f6f9d1e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRGVR1900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4697f15228569c2e3144b0eb9cf118721356fc6d7930d50cf5ce82a66ca7f08c. 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/BRGVR1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068bac0c652c2e4d0cf2d9ec7fa9428d92aa1e63c90c2713c75d8995d78b31e5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRGVR1900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd425d78ccfd27c9a62c1f0b5da897d5c97a68ee7b0c415d1d5a2afb4c132a2c7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRBOP1900579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5306670337072ebc9887eae51813f70acae3563345ecba4129ae3911f13b67ad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRBOP1900584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4838a039107485e16368b16348a92e679309aa9839ea8c692f954fe75bd02ee. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USHM81747751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8e221e7a019eeacbacb3607228392d88bd68a03905b1b5b4c7fd860f94e085. 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/BRTRB2013949.