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 0xfd14aa55ca4b7f59cc1335d20178ffb072b0661c2c763b43e7f62fa38de17941. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff0baa13-c9ec-48c2-86eb-7a0866e5ee77.json and https://artists.proofprofile.net/proofs/artist/ff0baa13-c9ec-48c2-86eb-7a0866e5ee77.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 0x03b82f3a64deac67d9e53415cee5320ed7b58f1102193d6a57e75d783cadf5a9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:05:35Z), 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/QZTAZ2278874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da90fea431ae10459eee3470c7a517c73347f966d3ed16f2817a6488bb5e6d2. 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/QZDA72376715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13ff685c62e2e01dfe87da9c9c70909e6aabf73037896df0629cbffdb1c70db. 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/QZNWQ2230856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e31fadc83b6b8ecceed0175b912e1a219c020a1a679a45da294cc7908450dce. 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/QZFYY2352768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5e69d50be9621c7c5404e488436eb621ee861f7ce52e3fdbdbb432319989cd. 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/QZTB92207264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce228a7fddae84c697d3881251c76e32270aa867eda72c800e012970b9adc9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAZ2331302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c1e27211154214c3fa65561b4ce92fcee8cbb172fc44ea6f2c05c5ff99288. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:39:08Z), 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/QZTB82380352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbdca3618ce5e3382392e43f5c32c6bdc8cd80ee9434dc7673a513e2d3e23a4. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:44Z), 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/QZWFG2333401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f25f74e2a91b8cbf7bb3a7c51de2228406ef0b52b6ab446a0e1bbf6d06f081b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:34:47Z), 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/QZFZ22438932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf68ac2c725cb92b4872f3d6e6add5147e91e3c3f825fa690cfe427157692790. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:54:45Z), 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/QZDA52408470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffb72695a7eeab534c820bf0a3024d3e207c21026950f79a29584cf713ac47c. 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/QZDA52404831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c475dbdc5c376ef2e3bf68a6ed73d40eab50948f8109377bcc9a99179114abd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZES82426293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55be2dae165fb4205e513c23bee282b6c3c97fac3fe88ef935bbb5f3c229427d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES92478375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706f89a6c78e90b69609d81585ad03ffff7dd3a9b7922ab1495d3ce601b62e0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN92489105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe465f0585f14c4a8e2c4397e593945a5df93b6444f8806318a5202044f733334. 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/QZK6Q2434435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ae1b3660f60ed78b1b6571d1b1d1356a43dbee3257870b3095be8380621512. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6J2466854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42def1b21a40dfccd4c9f6e2bd2ce9d906ea463350a4d70fb8b5464364cf546. 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/QZMEP2493660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e13d262a15412b0e2a9c4aa09714802fae3375680a7f9846193494dbc0e84. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWR2405433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb712d0c9537d9d11d02b2789092926ec94ad6a674f867ab9040dfd37548f50. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWZ2452287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8fafdb1468608a4a71faecef552e78b7db8e4555a5194ec929b79691ee144b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:01Z), 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/QZNWZ2489929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83cce3b5ceb9b239c6b2a1f8f5d2920e34e8ba226f3fd25c63af7b34c693e7b. 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/QZRP52463138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e908fa42f10335dce5d2d89e72a8f275b45b14d410a76cd2e9df4c06ea746. 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/QZTAT2423941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672ee571f364e2003e90f566018c6a6a41c0683045285abcd11495ca42672622. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAW2467269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa095d1c9830edcfd79a5aaf2432eb52f8e572a101429a853befae5735cc9f963. 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/QZTBE2424334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a99baa65ba6439b2ef49debf59261c4cf722842f12244a0081c91bed59dcee1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ772462164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7f55ea858811a530e1ea7f532e04001666883045f258ec1b83fcd268fcff2. 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/QZMEP2527329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d7962817cc96abb18beb3faa6d4dc22e3ba98a97a02633f578562a61ccd06. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7P2549013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218dbb8fec23558e7f6101bf4b6679d5ef5838137cf25bbe541ca9cf4b4ecf90. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F92574631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf40414bf06472b7bd3f3ed55c2ad8059a540e90500359b06f3ef38d7df1f63. 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/QZMEN2450219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc320ddc9257ff6aa3bf89c4e46fd5b0bee140d2a53e0f6661168afb5438364e0. 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/QZTB92413594.