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 0x88ac3a1e034d7abbb6e42b4662ea01c3177f21f1e9d7b712567804ba5ca92afd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b40d8fd7-297c-46dc-826f-a6e4bc053599.json and https://artists.proofprofile.net/proofs/artist/b40d8fd7-297c-46dc-826f-a6e4bc053599.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 0xe9501d3ef817dcc99a38b24375c0a7abab28624807470571d53e2f4b5b881e1b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5990204404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544caa31ca6fefd1db973e690b4560dda7177789bdca76af4eceed5681bff1b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAEW2059960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433b954f44622cafb5c088ebed42068666379090b2cfd9e45ccf8976607756eb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6N22595229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11e41eec302389f26a0b5d705c12f1b27639c0a05be595819e0e081d025ca31. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QM6N22595230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e602acee7f5019609042c807d8fe0449bf1a96f06fdda650cabc4eb632c099f. 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/QM6N22595231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872396be3ce34f9766c42d0416c062a17d4ee94e57f2204bc2680f2b75ad1a48. 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/QM6N22595232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104c25d0e69076601fbd9ebd9d3c7ff7b780f9ee011fa46f578afeb1432b8e68. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6N22595233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a02a8db7e009913cf04a1882a584e88a0a0fcfd03ff093e19f39436b6f456ea. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QM6N22595234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3647382b2f6f47230caba408caf3474a49e9d3de2b7f20cd62646b25695f9dea. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM6N22595235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21db04fdb577418890ff84f04798ff3c423651aff514f8a22fcbad921dd5f21f. 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/QM6N22595236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d2f4e166fe8c5d942c1af29ff687ab7505dbb369dc00edcdc0fe14792978c8. 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/QM6N22595237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c40108a78e03d93d33499fca02d16437ec983aeb03627ffa7dcd4ea428cc469. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6N22595238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f4454652fed1d76e462da5f579fe34c1b440cc2ac7911134a98c4b92db3dcc. 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/QM6N22595239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb955900bf9fe27a78ab44ecd56f71f203d80a8535959fdec6d284f01404f5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6N22595240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b49aad8e9925cdb424226996df9862a94a93742e5435fc64903e90f29c199a7. 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/QM6N22595242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350ad47ddfe0bf61c273872b89ac06e91ed9336f9490e670fda7f3410eeac2c3. 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/QM6N22595243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9404f64c9e72320bc39118a17fb43e6deae1f09f4611740c14cc8639bc0985ea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1717413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41c7460e6556d9d802ec044712489fa490f276c4bbe48a48444a56b2ff8fbef. 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/BXL6Z1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ac5456f0d8ee1e145609366f93ef298b46560ddc17c6897d894eb659e95a33. 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/BX9EO1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d68b39ac159166f5a1fe6f6d2fb1a7bd26adc047ea9a22729c348311551448. 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/BX3LP1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dafb9c26b4b75e9f61c9ea11ddd23999f67a6909b1e9ee09ab643f116fb84d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES6341600348.
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 0xc1c070d499b756a82493c65c4f9552bf9796127fcac18782bdc6b7765da67ffd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BX3LP1900011.