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 0x32c5a4415e5e473ce09132227ca00ec72ed0c997c128f78d0a5f6cef77df3755. 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/5f1afe15-834b-47a8-b2b8-95f9a8a82d7f.json and https://artists.proofprofile.net/proofs/artist/5f1afe15-834b-47a8-b2b8-95f9a8a82d7f.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 0xe40b208d11db07eaf648ee497c51ed694c601673559737e300dfb8d9f02e3853. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAIJ2456440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a8f7b1cb44fd0f0b83eaed1b281dea12a7befe5df65c580d67365d3dd15bb7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIJ2456443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7951202efb7bf6385c04fa2a90915bd24ed9922acabbd5e929f9bda08fe216b. 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/TCAIJ2456451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834dd1c9a528fc22ae863d7bb8eecfc442264dc906a3adcc28fb91fff4cf03d4. 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/TCAII2456454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ac7dff27622f01f695e3108913a3e8b5a16eb226042f94c13e709495563983. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAII2456459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6781ebfd794007a1bd45262e90e9ceea757855283c998287cb0ebf2fb06071. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:03Z), 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/TCAII2456462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a667a2a75ab4451ba01d9e4760a9f94f323589c3a823ab6edceb5bb9bf6ef7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:49Z), 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/TCAIJ2456464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056b735900dd7b6b485d6ccbc4fa6a01980b78ca265139950255025f7583e2a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIP2444533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2591dedc0bd43392a1354f4066b68c9ca91c3c11b95e639b4cc13f0b6f594df5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:03Z), 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/TCAIP2444536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7659f55f3ff92c79853e2051179c7136ed1b385ed4c860e0153fc08f469263. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:19Z), 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/TCAIQ2444540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049cc0a463fea8989e9d89f5a7e575261a813a516ca230567a01a60cb0e153db. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIP2444543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20417353949a4e226096551ae7030c3e859f6eac5deb5f739ed40847c9731097. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:12Z), 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/TCAIP2444549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d06ad26ccfedf16f7876c3139a08746a9fa2165cc36a8b2f0b3867be0929b7. 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/TCAIP2444562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7efc2750486a6486fe92ce95cb2cee7b2a53409cc88baf73dae0cf4feeecf4. 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/TCAIP2444565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe26ca983ee51e33d3f1a158643efc94a8bb4fab5797bac1ef27e6f6648e66. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:54Z), 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/TCAIQ2444568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d9acd8aed6d55666b4c6244945afa715ea28b3e6e5390f6d9ff2aae94c36c2. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAJB2455615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e1ed3c79f731368d9afd461aa9e2c1caeabf5a301544ab491b25c0eca6ca8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAJA2455619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bff8e0c7a2282a9869226272c4bf32efdccf0907dc27c935e7e4b2400ad24a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAJA2455621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6c815228d1fbb4f1c2c9f4dd6f5534aefdafcb70f42f02bb204e00cf92a9be. 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/TCAJA2455623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a217799dd2c3f71fa4cfe8709d88e5e5c77daf2216a7b00468186526e102e0. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:05:48Z), 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/TCAJA2455626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2301fe8814da889fcb946250cc74cc1fb5a45515eb1ce7daaafaa1af03af4a4. 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/TCAJA2455628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0eaef17f755af809d2e5be74a0ddc2d8f5b70ffe6cebde9801cf81c4756a7a. 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/TCAJA2455632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ed6fa3d72ec86aaae6eb3a415851c0a6ab50b9bf97b58ec5b823251c58ee53. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJA2455635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505af291d0eaa23a0502e24baaca638af1a3641e5bb784047c734ca5623f08de. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:27Z), 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/TCAJA2455483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be3affeeef3a6e4135074e0ab6ee9e10c9cfca1244409723cc0b11af91c914. 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/TCAJA2455489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bff965c0587da0dd8d968f9945914bf1aaec817e8eb36e34587e2b7b3ce20b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJB2455496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a20b67f0511c9a252fd7e1fd8ff3074a1102f753383a563dc806f482dfa806. 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/TCAJB2455499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2fb4df62bab739ce144822d17bac12303a1415740076c01ed62caafea83c8d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:42Z), 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/TCAJA2455502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524795ea42ba72e0773807af2c5fa268b3f6bd731cb64ff15f49b9bb926847f1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:56:24Z), 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/TCAJB2455504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e67aac192d44f2a0399345ce3806f36a9aafe15e974b8accaa5b54d5d5aa5. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAJA2455512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920c0075bef66c2c86d917d4cb40f05b10018ffdf9857f7a2e3a93927a4d71ed. 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/TCAJA2455516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487508b5ceca30d9851b6322362b17dd2f83979c04c525af8098998e87676823. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:41:07Z), 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/TCAJC2410160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693c33ccb1c204f211de1352159abe9f1f328f7b4e6c27f87e9e0677fe03676e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJB2410166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381f5d3e178aadf0d49977985b11f85a287cc1ff94570c3ffcb06cae4869106d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:39:54Z), 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/TCAJB2410169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326af64902c45e71da69874fdb128b5ef83dc2b2a6df66ab912af4975ce1cdfa. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAJB2410174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ff2aa4cce12ebbd2fc9f7a61d617fc95d0a5489888356bb458de936299b19. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:49Z), 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/TCAJB2410177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e7833466dac82c6eb7369d30b7459d16470acf24b7ab14bcbe39bffa91732. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJC2410181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d22d3c250b46f991886baf390cc1ca1f15f705e0219e5cad1f0992e6d5b7f1. 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/TCAJC2410184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b23658efee48ae7c6b40c2a7ee63c9868981db627e67f2043d37e3329e02b4. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/TCAJC2410189.