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 0xd8a1abda35391dedf70d3d14af8d61bfb7b676ea8f4c1e9fa77014e79d30240f. 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/1343f2b6-b90e-4b03-b324-14745e11cd4f.json and https://artists.proofprofile.net/proofs/artist/1343f2b6-b90e-4b03-b324-14745e11cd4f.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 0x8ca61a9480920cc5a67cffc0032fba27b5b7586823a8dcaf54985f8fc54025e2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CA5KR1948030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192aa6e066e07aafe3ebd7260e5e8a030a7d19610cd0c537b29aa6f245745bf. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:00Z), 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/CA5KR1948033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b15a155dc643e5e23225aec121d5982535c45b05f2bf1bba7ea49cde8ed3e66. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CA5KR1948034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34448326eb6852afdc48a8a3399ef432ac508340dbce7cabd03f30bb30745aff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR1948036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad6ec1fe15bb9b3d15a2071fcb3724b0610133c6ac91dd6dbc1b9d2f083b482. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CA5KR1948039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c32d7b0c79ddf111ec11eadbac39c7a79fffae7cf9d6e1fd04c91f143e4f77. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CA5KR1947896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657a4b4868b9807597b8482855cfb2df1f4f39f07180cb91f4b96bdc4f14be87. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR1947899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5b752c1ec047e02ea26e65b4e1e832090fbca9a20af3e8625f951e079e9828. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR1947903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a506a3cf09ccd9743de7ca10aacdd1a1dbe13a203c10886a725f85fd756767f. 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/CA5KR1947905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33365166c9a55a89e8332bdd1ee3ce5334b23073de3d3eaf62d4ad6b74733dff. 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/CA5KR1947906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f346a7fc5602e0f203624735d73caf89b101394f60603c585d1172be7504663. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CA5KR1947807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d76c5e0889f223af75f6ebdea63963019119cb06b527627b1e361216032fb0a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:56Z), 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/CA5KR1947808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591af7f54275c01e8b0195e2035aea9ff81c827463c81b4d2be7edb83a931fcb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR1947809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9097f90ab8409792f02dbb223a3828169cece15908bbb1b65a2cc5b7e5362d07. 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/CA5KR1947810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091141035ffee793973079b40e12b5bde0579e69bfc8952b1c5690fdbc376350. 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/CA5KR1947811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5535230dd2b58a1be4d524a8ae9b5ed7b31368e3af9cd9a5566248f54e6c71ff. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CA5KR1947813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4370ece49794dbb09f9e17260a8bfe013d5255b632ba6ca01ed36ab815ad6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:08Z), 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/CA5KR1947814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2747c95a900ba06ae007837c711f57f73099935ce2c12dad6f9170cf1211c5df. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:25Z), 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/CA5KR2207912.