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 0x37050d4e0dbb97a2f1bcf0e014e8f0f499e256ee719e5809633db2f1efe998b9. 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/ba9cf636-d0ed-4591-9a19-8632bd46c9bc.json and https://artists.proofprofile.net/proofs/artist/ba9cf636-d0ed-4591-9a19-8632bd46c9bc.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 0xdd2eefb31a65e0416a15829b683f1efd77eef94fa87361fa788b7cc3f7d7d751. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:24:41Z), 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/TCAJO2566706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41619435b1e91713c82107c3b288d9db2fa0e2710479943445808cb6ccedd380. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJO2566708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4d162b35089183d8fda411d9a63cfb8bd02cfe07377e898e07be7ec666127. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJO2566710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6135d65340ef8fa914341cf589a2fae812784f3f964291a9c3e10c4aa1a0713. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJO2566713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e41485c421f56681f5e5d1eabb30341bc81a8ebe1d7f4ce8425d96d2f18c63. 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/TCAJO2566718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74761bb519589f155b38ce96381f912cf0799d48c404fb05c371fe34d160d11. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJO2566719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600362fac2ddd67565e37c682698e46b90c54c3da6359145e9b8c1cbca0f0ef. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJP2566720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7e9bb5feebc12c7409749c62d725222e2d18a5df32650a8508ccb9ecd83dbc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJO2566721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209ef71fb5168d3100bda60ca8f8000ead5f4ea84388cf51f9f03a67b55fa1ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:53:51Z), 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/TCAJP2566728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cede0c31e98895e657b2a44bbd7b90854f399c05ad82babfd1043c56a75bd4. 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/TCAJO2566729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603227c620c3725666dd55671a9d9c165c061f28e32f1d94841ccf23719adb0c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJP2537020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ebae49941d86fc507edab67e92c63283affb33c775cc357fed58692eca48f1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:07:26Z), 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/TCAJQ2537021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26203cd5158e4bbad4b683a6440d4cce6a221d2ccb742d3209fb7cbcd38a8893. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAJP2537022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8c534ab9e6fb1e0cc6e7781dfc029602cd3e626636f64160b5f281d06fb75. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:45:43Z), 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/TCAJP2537027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d49ab05d1d9ed244be8a3def96865c6938503efe90e71a8bd45c9d0484de694. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJQ2537030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636ab8ad79416290b9de3a49346a1b80130a989fc754144671849a572e7a000e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:11:42Z), 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/TCAJP2537033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e139dadbf112f65ce220df3ead005563ac9e8b66ff528f5264cd9b9a8f2a3b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAJQ2537036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7023f8d5db26a91a48c5efdf052bb9ebfdcae605c8f5aedacd86ccfdbd2cf2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJP2537046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1246195654548323627c7753d7bdf041199af728b16c33254984a9557bd55365. 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/TCAJQ2537047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede21cc01d2d78bb979e4214b0d72ad9aae5ec57505d24cdc747aad65f8d8d76. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJP2537050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097af6ea1ea1806539577a539b190f149954842eef6e6a627caae6517efafdf. 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/TCAJP2537052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa906bb444e3e74db58b5cc6ab993d5ffd51eb77a1a32fdb2530e75145e518ee. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJP2537059.