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 0x18cc9bd7007e2c9f045e6e1e0c39bdad5b6b97992a09f9f34f2d7e71d9849481. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77670285-89d8-4eaa-996d-e5b3c2ad3fd1.json and https://artists.proofprofile.net/proofs/artist/77670285-89d8-4eaa-996d-e5b3c2ad3fd1.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 0x423ca9a5357cae8587076255fadccbbaa968e443b2548d9ca70e96ee173bf907. 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/QZWFN2306001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb36043371829379f4244b9393d4b2a2f657ced3435b34e215e3daa649da6025. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFN2306002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a799449973b624f8e40c2b3f4139515b7190047d1459f274faba830b78f61a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZWFN2306003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f9feb0e4f3aeffa43e74c964321b779535dd72fc1958810b8a0ef26eecc470. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFN2306004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f9de3d84e0d6ffbef1766ce8b8c3133f53d16d72542240504dd4a69841ac3d. 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/QZWFN2306005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da1857cd65b9e7113ea20a1948bc3ce0034b111eadf15e3143f7d930721810a. 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/QZWFN2306006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa041cd311be7f07a3917a48008364297da87b854d1466b8a837cfa5b6c4d92f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFN2306007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f67e79da53aebdcd6b95f9fc5b324bcb038bdc19aa9df73b8dba34df9a1a98f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFN2306008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b24409f8395a8e8793c7c55b80fe239037fb9927d5c77f46f4db448701b9ad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:47:29Z), 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/QZWFN2306009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd46ae41bb7b6dda22f2d9fc9bc8f21c16077e7846a60b282ecabca1fb8039f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFN2306010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1c0efdf710b2efcac7c41603ac172a15bac03fbb68f577b00df99df9ae1f18. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFN2306011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70343d759f49d4fcb1a8b6d9975cb4b5622f70670ccbf22b3d57dc24d63002. 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/QZWFN2306012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f67ba58b3f83dde6debe6527c277170d7fb21ef7013e89e6de1cfdb02e3841. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFN2306013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fecad95b39a06f742fdb1f44ed36a0ee29ed790d5f9022c65c68a169792e29d. 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/QZWFN2306014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5cd12734ce7cc3879f44c2c257357f9196483bbe5441afb32f2b328a6cb95b. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:27Z), 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/QZWFN2306016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebaec60bed6afae089ef48027a658e2047a91073878bc1b50b1d0c291ea1784. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFN2306017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb702b524c0560ce13f595427f4bcd22dadc375f90bd4d9924a0c6cf2f11428e8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFN2306018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42006a836e996845d3e888ec319ae7cc34087f2e4650e325c627e5b1181e44d6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:08Z), 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/QZWFN2306019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d22df93ac35f76eeda3d28293baff3f8a186cfd7edfa82469cc8aa855b70ec. 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/QZWFN2306020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c07c0f78daf5a216b3ffba00041a4922f910e6871e018576cb1431a94dcd8a2. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZWFN2306021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f897fa9edd7d7828cc27f8630be2da85204f4868328db7a057449078e25f4a. 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/QZES72492290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b8b96281ba303181a3fb2c6e804458202bae6402f886633b5130affbbc44b3. 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/QZES82424360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8de9675bda6e65ce0d731c9a9653673e5ce0c00c689b21b20aaf5c1d1767974. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:56:14Z), 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/QZES92478011.