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 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 0xaf207b853d61e1ce55d5b4967e1f9bee82137788dcdd327249ce60425cd8b3b4. 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/10868dad-4a22-4320-b214-6af53752e5ab.json and https://artists.proofprofile.net/proofs/artist/10868dad-4a22-4320-b214-6af53752e5ab.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 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 0xfdde82d464fe1c5c3be21462aa27acfccf3c9cd5962942fd4bdf65ba378b0659. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/COA9W1929662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e0869bdf0b2dea07424c64fab29df3f7d6c2b0257e9a29f3afa44e7cc039b. 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/COFC19219423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00bbacc86a15285138cc794599b1d8e008071316c5a802b662eeed6104eec43. 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/COFC19219424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1f766a58d64a0851ac269012f1fbda08ed4e73f1564f0ba42a7b9093dfedf0. 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/COFC19219428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c3e91de0e90e64e10d3ce598b0d8f7ab9625e43daea1898b59c75bffff13ee. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/COFC19219429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c99c1e59800f2b534babab75b275835a621c1b94258cf0cdc7e4e1e0d2b92c. 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/COFC19219430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29b3a4093bf334468f3f4a20ba121b30b75c287edc3ab065f310366f4a33155. 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/COFC19219432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88485a420f620ec1e6e46444a8c243ab18e993f283bf88c3086a281b70fb03. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/COFC12604003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b30a85e64b67840d7f3608b3b00651185a3e644f3cce79bfa1cc553f696455. 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/COFC12604005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d9400eca41b13a4853b5378a97072b50d3700a4cf7215d043bab4f1489ead2. 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/COFC12604006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50cee1b02d662fbb7beb7203c5a5f4bedd222945f412b7fe660fde6d7729d97. 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/QM4TX1710240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5cb6cfcc143922c3ee96d70d97a3d3756b42eb3d3d95fed247d8b9048f600c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TX1710242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8985f1a4cf9bcf0b19bb42330badecf2fff1225ba9d2861ce0597f67e3cc9c48. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TW1561652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a9ba13707d389b8d3936b050313cc18fcb37f09feb16d4451a0f9116782233. 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/COA9W1929658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9819ad4db62f0b250b9aa090897b4bcd49103b52077589eab6370c3d4005a5b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/COA9W1929729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400480073140f2e53f3a5f292d7e4b6f17c8391940fee1717388f8b5676fedad. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZ22B3003539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4323f8400fd02b694610359b592ab73f00f28e0fc42a67473425de406fe2ad0e. 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/QZWDW2497408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a88beaeb013821160d58ae62f63f46a9c364f714122a39ddbab4f3a9de3adc3. 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/GX3Q92483537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12125b71ef444052e82e4cca9773a65fa81b66c97e31924475d6e65da8da68. 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/US6R21399991.