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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 0xecc461ac66f7ab69d2c0cbc005d6f4bf5431cf31d4869bf6c59a34e9250ab2c5. 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/3b49d312-61f2-4ca4-ae65-8630263d7933.json and https://artists.proofprofile.net/proofs/artist/3b49d312-61f2-4ca4-ae65-8630263d7933.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 0x31eb2cf852ee135118e08752a7f50743b2e34377551ff5235b0f4f6c55d41674. 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/QM24S1921285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa4c66f54db6bda7b2b75f214ddb80124e0e970b99f271df52e2793ca3d4f75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA72142618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2d2a80be87717284c4ebce109f4b3181d221bfd0705d612873148c94394730. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72142619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0911b0f26e720f1cc37071b5e5e408218d8b2154f34332d7adf31dbb49c64f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ52187901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb676db59d445e4a75aa711cfd35e89ae445e3f56f7ef2160c8768a7a3dff3015. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72142620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c61a3346a8ca40989e735c05743e1dc3e168de60fcbe63418a8f81d09f5a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA72142622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f187eb43975c3d443d1473a14c9f146edd1f052f0d37792fa205f4820e1130. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72142626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3a71c4a1568adf6f437f70afe86b9b6b03b11911ab977ed36c3ab079e433fb. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDA72142614.
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 0xeed3b875015d4efeccf8c683a03f1a63a0b5048d0cb77559c921496f894894ed. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZDA72142615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de72be81633bffe44f6f32eae98aa78fbb59f3a2f728058b5c40e5d7dfd28f5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDA72142617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509c6ff67e92225aa9e5b98a0cb3dae91c72c197b55a2399c6fc0246901ab333. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA72142621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d15f6adc2fc58049ce53a3e1b7b32d1dc64528f1a466e25161423a9bf0da7f6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZDA72142623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7cd4f5c4ce632acb24c6fcbc51bdf28589eced2b12abf7339e04475e0f9d61. 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/QZDA72142625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507c252cc2f82601204c4eaf44c3d024a864338395470882675ac61435fcd3b2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA72142627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2408390621d825d731d749d1f231e53a6d50f5a8a9851d06251c9e095ed4402. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA72142629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33cc9d380a280dd1a5e8e73cf6525e9f0e8d023767a7940156ef244c07ef120. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US3DF2466724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33cc9d380a280dd1a5e8e73cf6525e9f0e8d023767a7940156ef244c07ef120. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/US3DF2466724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4c2870f7bad67e6a78920710d14f7672f875b5472aa73dec5d1565a301e35. 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/USANG2478394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bcaadaa831c6e322dc257da9c18c1e1eb40bda889ac0a088585da3adef56e1. 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/QZTAY2522499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f486e21319670c6cc1f4588156b3271c4fcf2e5f1137821d9fcf29b8b2da0d. 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/US3DF2580340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d203ecc1343e578ffc43f861bb35327622e4562922bca9906d1afda27266b42. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72342306.