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 0x77c52ece351594ad4d4dc4acc61b9146495f4e17c412b2b4373b6f9e1ccc6765. 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/c02da33e-a108-4352-ab25-f1c0214648b2.json and https://artists.proofprofile.net/proofs/artist/c02da33e-a108-4352-ab25-f1c0214648b2.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 0xfc74627d46ad2072d3c904f4de12bb867f65c518dc28b1246366e1e723f4fb99. 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/QZ5AB1642599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ab6dd557cb04e1ef5d62a098d7c6337b737a814ece19009190c16420b418bf. 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/QZ5AB1642600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03ed0ab945edc0151277adcebab2a2803038c84a35231ba99c95a8a85a34194. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:20:53Z), 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/QZ5AB1642601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52148190ac0a830abaabc1951ec40ce9136acbdb9898356a008f4e23b8855d0e. 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/QZ5AB1642603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535728eeadc32bcbd7eaca8ab39972dda1dc820b54f63d10e9a2680845cc2dc4. 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/QZ5AB1642604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497ace2ac18ee78e24297458e6463f13d155b39e7afffeb2aeb9fd8d33b9306. 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/QZ5AB1642606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d101ce87d4e95638921948756eaca4c07b1e0bec75a09d8327b135ce677af4d. 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/QZ5AB1642610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14824548af796100761c051fb976599c26c8200632ac494b8a11f0422a03b8d7. 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/QZMZ92468125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1332b17856284bbdf3261ee8f39b881725016feed228361316d5d7765080a11. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXBAV2455960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799975f0caf5e92cd86f3906726281089483f75fc9078c2ffe0710b2a27bd0b0. 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/GXBAV2325803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637cdadbe2349b81abf844786f6be23b7281c179732dfb0fbec9792d94e16b2f. 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/GBLPF6766721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff335979a34480f93a0e89bf382418173b4d6e3c556f689db3079ba169785ec7. 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/NLRD52212364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af4f1684b64e6d2065763cbae7141558c7ffbef64a886facfbbd4f6b61cc63. 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/CH6542257313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c74111e34683e408e3deacc01ed437423871ceb38233217ec00fabac0b11cfb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMFMF2107803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea82c1b664bb4fd41ee60ead18008e44e082087001968e2e107dd094181342. 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/GBLPF0286849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29f30223739a1d1ff123f129ee07277488bdb60ae16e9551bb602ba5f0f07e. 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/ES69S1500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80053eb88201c920bf441cea8352a40cbfb7eba055654f785d754f54aa703e66. 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/QZNJX2463753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d4ab84a60a199895dab97400576c15e3c3ac84a3e2e81e8384c6342394c74c. 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/QZ4JJ1645738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ddc328145e834fd55868eba8fe34c028faf5bfa27dfea474e518ef2b06aa0. 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/GBLPF6673026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17133840ba8b3c66e6d713cd519d0b2196595af2bb9639b776b78c5f631f342. 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/QMDA62233646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb6aea10c9ae0e9d0e67b3644bb8997cd0bbb80a53d53355f72507b8bd86806. 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/QM4TW2215744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0241378c6ac74ef4891b625e0ad22c8810652ee12b0a3352fcba2f49fa538. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLPF0265186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d61301efc8d6c522ae254e40af526096282be0b8b1fd62b843866a4ec761d34. 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/QZTVM2418218.