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 0x020eac0df0bba9bb03f1449f116fa711e824061b7dbfc5ddd4e6dc9682a3a122. 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/edd61782-f0d4-4576-83bd-e78b1cfc2426.json and https://artists.proofprofile.net/proofs/artist/edd61782-f0d4-4576-83bd-e78b1cfc2426.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 0x121451ee797ea31cd4314d461229e41462105a82c01a6636f2ef7d20909d2860. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAHO2343815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb8620f6f57b532d26d3d6a894a22ff00b0a61f868966d9501b57ce93733135. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIF2483296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe21ab5e7fccfccb8c3049a3e03f10d9a9070c4b1217ba0d341070dc45ead7ef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIK2430501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dc93978087039956734ddee455347d35fad0f144c82d5a2397959e4d5cccd3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIQ2479303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36226b5476963e4d589d75d44e2991a52c2c98e089868c971fd7b848c30e60. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAIU2431931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe8d6aa4360d7c202296ed29633d67fa89ccff4fcda5d5422d1d05c7820f8ef. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAIS2489894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210ad3f54f1c4b502115fe09fb5842ee6de8cc60c7c6c38e77ec080b7fac001e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAIT2422497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eb06e13ad156e11a23d47bda41ce647d7bfedeef52a44365a9f4264fc32c5e. 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/TCAIT2422538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103a39304df2eb5684afd920d34b0bf852b57df67c3228dbe7cb0df8e23f985e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIU2422594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcafccedca8b609c2ae45b67a23937a580cbde5d07903fd254eff55fa7904db1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAIU2422628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb912095a673e4b0353ff76d63a0d57779142cb7c3b71707917bd9fed4bfbdd39. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIU2422661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e2e3b7add3e4addf8389130825ea01d51cafba222d441028449fb199a90e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIT2422689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed2950e15afb57bcc535de71d61c5000f83e62801dc8c7214c2876b2872d588. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAIU2432331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ee034ca44dc31367b1035fe9476127a2f703c628868b56352dd4d4279b0c4. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAJA2410294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6ccdb85d210ee6917994f8780e17d9b7f9a0e2b36f6aa04e943409d6ff2001. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIY2461644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c88b5a261a35f5e46de64c93338054d40891634293efae623da70dbf9346218. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAJE2465811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501fd3e74f2a0ea3ae90054f6a0925bdf07fb0a2912897b9e7693c533e29ca01. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAJA2450086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253c97d13164531b17ccc7e0b31a51e99c19b0c0b1c85663707857641802417e. 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/TCAJA2450122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52340441aedc1bee49b30cafa53dbca9b6c89ffbe5e1ebc4873ab3003ea7fef0. 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/TCAJA2450201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1d182e1e8ce30e112ce8ccdff9ca94e5702b58a3722e89fb05dfac20ba6c37. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAJA2450254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d15fd7e33af0e5d4d5d21ee64e593b583d99d5c3b5c1955c8a44699c619000. 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/TCAJA2410469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e5aca0c49abda2b5e16e6cce2b0b39fa6173bf3b279d4524dc4eae869cb2e2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJE2541215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bf6d5238219208e2246d54c0d4e0ec2624fe286af70ee9296e5d65f0538888. 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/TCAJA2410562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9722f23b769d39c1f69079eeaa89badbd7a5208f41f96af3dde4c107a0da935. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAJF2526022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1368e531e84b2e11372a2a31dae98a8560957231504def4da0a40889f5d4c226. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/TCAJC2433812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c21a93439e742bd08e9670cbe9ad3dd02b57819b00c934940ac37ac5a7bc846. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAJD2433900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d93b68abbbcb4c6c9e6309a0014073f7f3fc36857d784c14de591d3e7887070. 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/TCAJB2498926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c01a43111bb86c70f4ff221d94b96db8a7e423958f81a92a35326adf1e26d9. 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/TCAJN2542563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88420b5b63627bb2997d213d0102c6cca46d4f97f737c5d77b1906713b8c2bdc. 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/TCAJI2589715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c4fe8c1f4377fee9162074616804ee84baee57ca4d1b8eb82fd45e3e17895. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCAJK2543651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e172d0aa94a5e9cb068873020c8f9c5964e9fa3878ef4234a39c2390889adb2. 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/TCAJQ2529731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7cb14e62c1d50d278f3693f96b6ec2782350cf87bff3ee112116a57c97b4eb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJR2555412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ef3f5a7772224c36e896a97ce6df6109e78dd5e003a2d5825dcfed068a2ac. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAJS2564085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9e7e2515335d173e95db4f6c9976d44525c153fa58c9e7d070bdf4fd984af3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAJT2564137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2954540e5c851aca47d3ae2f1b330d8454b6d564745db79fba01bb12af669f51. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAJS2564213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe347d6183bb558ed5379f7686929d2471d6e19b708944c70db5bd9944fe5704c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAJT2571080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc7323a20c0a24a346790aec9a5fea58f84f17d6167db169f2204fe539e1efb. 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/TCAJU2579160.