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 0xa1fc34e09056c5533e702bda5f9a743f563f81eb44bb8a44d12f645c41104a92. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eee046fd-7965-4cbe-a2cf-059417a05be3.json and https://artists.proofprofile.net/proofs/artist/eee046fd-7965-4cbe-a2cf-059417a05be3.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 0x0eab151c02a496a705b1b82ae1b4d9ab7307b023c63f5d9cbd9db1ce56ee7c13. 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/TCAIZ2409925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d178c1623fac34f2caa022c1ff412a0d6397c11af40d77db68593875f264d3. 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/TCAIZ2409963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421e14b349dc8c6944fb42bf08fc022c83579a4c914c9e700fbf10c798a63175. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAIZ2431771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3d07375eca6ccb34c71efa75f1c17565436a6e5827930e72b54a338091cfb0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIZ2431629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7c2ef78954ccd0c3cb6bb48378870df034e698263a201eb5f8d8699ec91c3. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAIZ2454845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7322c59eba39a6aff20f5bcee906f4c3659c2dda4b468990968a3789800ec2b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIZ2466290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed72537f848061ad2c5ec6e056036077cc9a11c8b17c79088247e768a004894. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIZ2499277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8337d7478692bf37464a3f31a2ef97bff71d14c1c285d0aeac673f326ece319. 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/TCAJA2414869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4947a6d0533521fb9fdf90900d7dc0713364ea0aa8da5fce7bb25414cfceef5c. 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/TCAJB2414815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdcf67e542c5d02ce4335430e78f61923bba5494208d2e2391931b659aeba4a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIZ2494761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1f6b937c1f2b6c32160780c185cf1a1e25ed38ca4196db4134d322fcebcc3b. 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/TCAJA2437680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee05e87c5d4ab2f42e372fc6f29a3db5d6ba05ab6999ea2fbc6781258daf25. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJB2435910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e802b7a5a696be9e245078752cd878c707923de7a675384555d9c5b0f1d10. 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/TCAJA2435890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7723f912fbb6a99b3d1778c5e031e00a5c32a42011982338b9d3cf9974abad4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJA2478976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958428f79024f6de9b6a4d34903efa0405503bb5c79be38c4fa2eb0703b1db22. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJA2479017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc764fa40a96dab3d47494cb69190964afe4983d4da0ec84c814751fa3b6d70f3. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAJB2445140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe799a63daeb01d8133e9ece767b5bd622a1cee4b3e36dc99b5d94474fa4e4ec5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJB2445097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cf8492fc8c2404c579a7b57ef1fca0e18010328aaede97eec57bf869e2b5a9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJB2455048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1529ca78e2cb5e25d94c7442e2b67087ed337a557a2a6be5efc368184c06e2b7. 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/TCAJB2454717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831c07d18d6e4b4888c4e0d25617805c3bad3a34eea23058f88a93b108243c7f. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAJC2400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02472078d9d0931d16d4fef1181634ddd7530e2a002b38f19ee59fdf34947eba. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJC2428715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc6c980b502c7d729578ff0002e2b93557ca7710d4f42e43a5082ca7902895c. 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/TCAJC2428651.