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 0x3c6d3e05e53ef7461868208aa41c9bac477f21f5fdfbcaf5017d16e98238918d. 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/d5f838c1-0e1a-41f8-9d89-6b063c0a40bf.json and https://artists.proofprofile.net/proofs/artist/d5f838c1-0e1a-41f8-9d89-6b063c0a40bf.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 0x6ed50f428242623710a05334b447c81d9cbdec500a71088b7217fc74634c8edb. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZMEQ2469277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1971b0ddf82f8ea6f0a3d9bf6d0854656014e8a99908e92a4122325775c7d319. 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/QZNWR2448072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81467473fd2341818fd530097e6b8ec9d55f697410896d6440d37ce443045a47. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAT2468312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb21615e4aea1170f0c3b00d3584e55ce3640d0bc04f92d80b4c028e20fb633e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTAT2468313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe591a56fdea8f529f12c5b56a01f3c1067338d50becd2d42aaa1cecd19625605. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFN2420437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf46f34cca818fe95bb0e2c478da2c55b3b7e24137fc063a201857aef4ea8484. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFN2420438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ce1cc64ba516f1c382ff6abc2b9a203ed0d30f4f58be8043c391c6daa24448. 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/QZWFX2415753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564f2d43c546b7d7ccb0cbf7e256e9293788648e551d803679e86fa6f32b9f13. 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/QZWFX2415754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfbe6be2734f0e95a69506e409ff8f51ab2d8d29ce24c89f650075a9e3c419f. 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/QZNWU2510763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a7b740b32171cdd0656a648b85e3d6f436ee67c86cbfe5becada2dc76e9cb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFX2419845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6d254c928dcf01c5fe926d9729040eeb3bf800013195adc84fde5b32c910f6. 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/QZWFX2419848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc3d252474cfbc3006513c76440678efbb32edda1bd088c2ac8ea0d84ed42c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFX2419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695d01dc1fcc19e6f1b2f5b1c0d01c3df09e60a93434772424f3f1cd068e959f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFX2419850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5e9b8a2ff01a15ba9f043ece41231e2df5589b73bd9201ac83a8e24a2c892b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFX2419851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a438ffc2e7352ecb5a09b284c366b7cc74769d3a294812e1db047a32bdbe6. 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/QZWFX2419853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a7b740b32171cdd0656a648b85e3d6f436ee67c86cbfe5becada2dc76e9cb. 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/QZWFX2419845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc3d252474cfbc3006513c76440678efbb32edda1bd088c2ac8ea0d84ed42c. 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/QZWFX2419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5e9b8a2ff01a15ba9f043ece41231e2df5589b73bd9201ac83a8e24a2c892b. 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/QZWFX2419851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260be33c4af1d8f740210f6750b5bc27c740f521c5fc70457c3bf3fef8212067. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZFZ32593678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0568b460210b290acb68654b9dc0b3a2c1565b16f308a3e064ea123bdb338d99. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QT3F22473725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888406b372364e2765f2675822416a77eae52d1a58ef7d29c4dc7ce7baf8d3cd. 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/QT3F22473726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9e2a6dcf463ecd36068554e8325ef96c928ce0b738ae45c2b7338b33e6fba6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QT3F22473727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af354dd4fc7316617692400e5e7948952dabde13f43431ffe0774b010de849a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT3F22473724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0568b460210b290acb68654b9dc0b3a2c1565b16f308a3e064ea123bdb338d99. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QT3F22473725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888406b372364e2765f2675822416a77eae52d1a58ef7d29c4dc7ce7baf8d3cd. 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/QT3F22473726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9e2a6dcf463ecd36068554e8325ef96c928ce0b738ae45c2b7338b33e6fba6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QT3F22473727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf971876b72a0e2069cc34f06cc1d57cd6e240809979436bf17a6fcc69d656f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2562254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2edf0682d9f1f3bf43c2f76e2d6dbcbbd3a3bef89a5e45084e78e5278ee433. 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/QZFYZ2562255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5715b2c29fb3dfa1ec63e04848d4e4a0519626c59f89b53d5f262cf87bde08b0. 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/QZFYZ2562257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5eaeb6b3cad9ed06f25d2224618845007acc4909823607513535d6c9e454c6. 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/QZFYZ2562258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f25e6d91920bcf3cb09a2cffe1e26fd6d932665e4bfc403cea336277cc6d6d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2562259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b3f7eaad7ecc2ae776a7cfa489ab38c407d49f09fc7b0638064ad7a5807d68. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6Q2586779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5065dd42c7eaba5511e80d3a832f071ea4cfbe2905b6216fe8b6e3a68d345. 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/QZK6Q2586780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8498d035b3fd0f7618f5713e57d96b007104633682fc45fafbefb2b0bcc1e1b5. 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/QZK6Q2586781.