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 0x96f40fba5be0e3711bedcb1b1959f4cf5b828933119280c05501f28fbacdf2d5. 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/ff5347bb-b981-4812-9748-d250a8965bee.json and https://artists.proofprofile.net/proofs/artist/ff5347bb-b981-4812-9748-d250a8965bee.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 0x0b645a972018f0658ba365d88591b548cdb749bb9289a53bfce94ff448469c32. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN52201250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97da840ec0792944e0cf12bc45bbb29877ce3c019c75cdd6a224fc90d402917. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN52201257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480adf90d82edeb8f82d38eca1d1c95b7bd26d3e9b3d86edf735acf8dc24fee8. 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/QZDQH2354848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbebfd347d20fad977397a8da4377fe2294806f078f6063dfbe132dece964e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:04:10Z), 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/QZES92370788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30be2d7752c9aefb764c20d16d0b75b3b3a3a60b0db54fa4f03d32d058730b7c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES92370787.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb028908fe61b20272fee2f9d36baa1f02b573046cb90a92ad413275ca47689a2. 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/QZNWX2307974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb7d73cb3854e70d408b205fdb306ca0e093b15c18561bdee59d9efe5070b7. 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/QZTB72383923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a49a479f1ecc75c6a4bdbc29a85db30f8674b6649d0503532e52613877fc54. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB72383927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8599f6bec13f56f80421d7d856fa147ccc3ed65e8b4298d7cc4f05acc2a4afc3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:39:44Z), 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/QZTB72383935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36cc0364dc8297f133bd5a4a323803b5b013863d30b6e22bced98de970faa0f. 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/QZWFQ2330991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da21e8e7fbb36b94a41ff6fd050b0c92e077135f0556e71c03e3a6e4f36bfb7. 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/QZES52425585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50079026a1a06fbd871a7222d17f34b601e6ba6e25bb24e6a5fbf1f3f95b4784. 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/QZK6Q2480945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b54a2caa21811f5f6f92df4f2f6f80f6428a781414bf303568985bfb07e45f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:58:59Z), 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/QZK6M2466257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca1d5a6eb183232ce0ba7bc13293bcec023c64e5c186fc69a2a8e1c20ffec35. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:20Z), 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/QZDQH2442176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d650dbb8821522c71831efdd32f349ed60302840c6583d5fd35da1d9739cca5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDQH2442178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740537b02a7804dcdf7be5b04fa9988619bc6255edcd527762ede491a78339ea. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2442181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7fe0bd67b05674b6adf2d3acb8daaef7e23e7a923125acc0c68dc1f62930b3. 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/QZDQH2442186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2d3ef6d0ea9ee7e5c151f346879751e43d1f5827da67b961d57d2f4710779a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDQH2442187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3d02ddd12f7f165976b4cc7b2602dd246ca635aec2189d0daa11b98581b06e. 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/QZDQH2442188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd964ee22a2c64df54994f30807a561b0a96c828397c430006d154a0506010923. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZDQH2442190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3628e4d8fba97340508fbd58f6118491e0a89d8b6b37d4c1f87d05eed65ecee7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:50Z), 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/QZDQH2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dac0bfe4237315067114c67cefc233ee03296eda53c6015e999f6d9a49c34a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:40Z), 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/QZDQH2509764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8963eb4ba94fdf455b5f59d5f6faad0392fb5c546490fc501ee494e038b97fc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:51Z), 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/QZDQH2513780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d52d76ad97bb9e5db2e7b19a2b58ee7a0d67a78f3a4203ee8943acd423889. 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/QZDQH2528331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd613734f19f99eb00cde05804561aacb72d0598e509b9193ef66c1497dd0a2bc. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZDQH2534838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387bb022f0865e947f735aa02a16ad6b2608d32629ef812eea8802fe63771b3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDQH2540123.