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 0x86c1fadc708b5b9f20f8db6f7defaf6beab658fa6baf1192adc6c159711ffd09. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a590290-8fbc-4525-bfbc-a91a03dc01d8.json and https://artists.proofprofile.net/proofs/artist/4a590290-8fbc-4525-bfbc-a91a03dc01d8.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 0x8ac6c6a3df90e62ce39f31485c3dd4f653718a0cfbd4f156c6faac8bd69b8f6c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR96X1985937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac27f54ae15de1b1a22159ce2e062b311b13f1a0670f7d2f18aa1e6b4a94a6. 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/FR96X2072070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8074b61b154af6af2a7556597df13e94b2adf65fe1cbca102d1d125be2f6fe77. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:35Z), 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/FR96X2104274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41120b4e158d9c7fffb710a0e994c71a8083b4e36d30061f1dd8bc48bef2937c. 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/FR96X2158041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d70595e83ff7b959f3772bf6a6d9d994d12c4d886bcc718aa308a0d9733303d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2158043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c761329a69209e40cd803f04a086c36152e440ec926dc4f56936621b05bb2d. 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/DGA0M2379055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f34f8adab57300de63f44ce7d1bfa9471f56ba2b652673a289587eef460b5. 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/FRX762408106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729cb5ea4335a74fa144d02ccf99520d139c36c3a17b1c8d9a56b7ef01ccbb4b. 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/FRX762408108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986e83fb8468a7736da43cc992c78fe1550a01fb0688f82ecd98f944355bd9c. 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/FRX762408109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9969a1669754e026059933895907931f0ec79e28fe76d201ce2286efd141b. 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/FRX762408111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5eaa4ccb9797b320b474573da59ad469e38f3d2b1b328c103f72b010288701. 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/FRX762408112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11365c15ab12e431b2effe7246cd717140ec7ff463f892c52eedd9c9ac13a361. 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/FRX762408113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd462ee7c746d9bfbb64bb5b56aa606ffe47a025dcaef17fa18b069726d418ecd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRX762408114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c738de5561b82585a36b599e741dd4de65f08fc9a8e01d87b890190742661. 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/FRX762408116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f34f8adab57300de63f44ce7d1bfa9471f56ba2b652673a289587eef460b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762408106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abbd5d3c49b10b8d3d3b98ddffe193d1943b43fbb2b1f92c82ece459c5e0ff1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762408107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729cb5ea4335a74fa144d02ccf99520d139c36c3a17b1c8d9a56b7ef01ccbb4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762408108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986e83fb8468a7736da43cc992c78fe1550a01fb0688f82ecd98f944355bd9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762408109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb80934a391cedb976865d78cae5068943ad1cba17b015a866612ae87003311. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762408110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9969a1669754e026059933895907931f0ec79e28fe76d201ce2286efd141b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762408111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5eaa4ccb9797b320b474573da59ad469e38f3d2b1b328c103f72b010288701. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762408112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11365c15ab12e431b2effe7246cd717140ec7ff463f892c52eedd9c9ac13a361. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762408113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd462ee7c746d9bfbb64bb5b56aa606ffe47a025dcaef17fa18b069726d418ecd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762408114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a8ae69db95534dfb013dc132ce9cfa99f7ae90b6f10dae86517b7f69d000d8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762408115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c738de5561b82585a36b599e741dd4de65f08fc9a8e01d87b890190742661. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762408116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e595846520278a05ca31fe68465322b56400bad2997fa1a0eebb37f8f3ec48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202018930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2af99467b1beadde6dbb6b86d0cdccedd1acb2d77a42c64a72cd5dc363937b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202018938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb32110da97527e611c55d55b393a22d005d5e9acab7522659f134f459e386a2. 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/FRX202018948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6430072c1e51cd5eaea0656b3637c44e95af41a4cad387063debaa32ac8f265a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2405483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe336c41c0bc41b013c1ab6bf1cf7e6381573de01729d6f4ea77cbc9da051c75. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TR0012200562.
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