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 0x166227a8365d69ab18136ef0080977ea474a30387376b44559ecacb876188f0c. 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/51748c6f-984f-4673-a10b-92802dbfa92f.json and https://artists.proofprofile.net/proofs/artist/51748c6f-984f-4673-a10b-92802dbfa92f.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 0x112025b0f815e602bf581d15ffbe92fefaf7101edb95fff649ff1cabf1c41ccf. 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/QZK6J2116593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006186db5dbfc8f4ec8e0752f0594527019479cd8e58f02b2eecd5f8deb656e4. 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/QZMEQ2192804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482593c2a039785e477952f1008573806d069e2da0d3053bf695098b882ced94. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZN882185544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bf72fcc48647229f79d0ecbca08135c37400113f684229fcf14588385ce806. 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/QZN882203238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc2a696168531f07f5e3174c38b2dc5e698511f8f327ae25766cfbebabb9bda. 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/QZN882261023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0b2c3bcd40558f68d868c2450e4785ee589ac9b50f5155ac5a23aadbbb4bad. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZWDW2364916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930229dd8a26a8fe643d3c972369fc1859a9560805dbf200bc87bccbb0a5686e. 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/QZWDW2379789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7538d23b6e49dc7c4aef28ccaf57717d0a58b75b8fbef9c5fab2129ba38ae. 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/QZYFZ2317757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cbd604921e783de52ec386158a7b39755242592514d9d2dc8a55ea87ab253c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZYFZ2317759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae06f1915941d2e0ce5600d084071b2e4b90b36bcc6ea7d8767bc049b46d68. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZYFZ2317760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3eb866d4bc17b1a5e798013feb52594f303b5a7fb11ae53765551935e413bd. 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/QZYFZ2370345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339fb666af53e5ad9bb4943ae3443caa48478e5b3b03df00f4d7de3d16e34616. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:01Z), 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/QZZ662316969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd2c649537507dfa6b026e1f240a5b33e8ea06e17677486900139d56f7ea93c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:00Z), 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/QZZ662358514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1578ce1aaf441791362beeda3ef4483e40213d0d61f81f2363b15526d50913f8. 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/QZZ662455909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1ee5676ecc41a1a24a39a90837db1dcb2ba441b30340f5d9b9b7c746f2341d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:40Z), 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/QZWDW2411030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15209cc909eb7fbdcf724c09c6ed0d5d79822ba912f7083642f2e7318009b46b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882417254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc649ac65a9691fb4f796fcf58d7a6ca29bb67091a970076a4c4cae0c7111ee. 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/QZWDW2500416.