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 0xbd263040978fa082a33b7bfa4d66cf8051a60b4f4a8d8dca50ee771b397dc557. 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/16991ceb-6474-493c-9ff8-b861942fcf28.json and https://artists.proofprofile.net/proofs/artist/16991ceb-6474-493c-9ff8-b861942fcf28.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 0xe867462254a1fb6181d05e61871e2dbe1c955e88ceb240c5e7f48406acbb5b34. 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/HKJ961900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e19ef4c0b62f5fd887fd591d17f0038e6f1eece4e242b5338a13ba771d0743e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:32Z), 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/HKJ961900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547c7bcc952c1f9e7c6ceb4d554861ee346564eb5dd3d0b30b7a139cd43a0b2. 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/HKJ961900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0729d7a142a2d534975577a05a07955f0e564ef624e60bacc7a0648ecc79ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKJ961900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b448ce7940d2ad166a79039e945db29a66f5cf88da656662bd8ce471731791. 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/HKJ961900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf014ac004ef0a91d740dbcad0193940c73104e583b3e954899475b2e669c0b07. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/HKJ961900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e71e72817002afc55a8a9d9d5a23c0dc5608e9b28aa3cf81f534fb893c78b0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HKJ961900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6b67d298057794f240066fde1960bf5ef795c13fb17028bf2ac58a48d3cb67. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/HKJ961900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43944eb2c4c1afd5e54bf88fe87de976f022bacb80b9128d2a61227b4e7b031. 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/HKJ961900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466377829202488487b570a302f56e9695ba618c3b94ddd23eec7b3265dd07b3. 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/HKJ962100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b704e2deb92ed0f5d7d551ff10a8a020a5901cca23b517ca02eb5d4aaa93b40. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKJ962100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dcd1b5e0655d2819f32f9933ad878b56c4f4f87472625751f52595c49eabb1. 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/HKJ962100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243753808fb7ba772b0d6659a3ab787bc33d0eb4ceb1a44f034ab7d3ed6b93d0. 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/HKJ962100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11952b420a84fbf27a48dae03632b14d845be97a5c145dd903f64558f31c71be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKJ962100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50183b65b71356caa66685f731f88d2c9294eb1d8e8911291097634f90c138bc. 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/HKJ962100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a46705b4bfb7637e905cb842a449865ed64e4bfebe737bba4638792aeacc417. 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/HKJ962100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb632e2f9de6e5d6a58c7aa6a9344e68801ea892ccf36696595ff33ea443433f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKJ962100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7a3236c8f89cc511a412c298799087125851f3ba34c106e03ac839eab6e24e. 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/HKJ962100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466377829202488487b570a302f56e9695ba618c3b94ddd23eec7b3265dd07b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKJ962100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de3b4e2e018a270afb3bc56d2e41f6ced1a64f808283993d4d6346bbf0e40ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKJ962100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c581eb608e9d5aeab6bd629162bed6c7d0623fe5a405045deec02ac9892258. 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/HKJ962100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818f01bdef65a2373f497dc59b15b0488f52424e998c6df21943ae647a627221. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKJ962100013.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa095ce3d554e71afdfc0d181e03ff4722dbf2902414976df9f0995ebec76bb89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKJ962100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f783656ed36440181188518a9810541b4fdf3b0bcdbabef5d1a24532c8615. 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/HKJ962100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b360d6d1058b1a0d679894d41d8655be468a7b998d3f4425d92fa29850301. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKJ962100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552499896ffb98b5bee5047c681d7d62cda329a7dc82c0f02f838fee02095420. 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/QZMEP2372600.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bb68b1299193c3d25b7cc6296d8ca2a2cdf325518a3c7b871f3f9fb8812bfe. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QM7282410660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bd78623e7c629786878bc8206a5f8b5f66889c2d2b4d679ad703670b1be2fd. 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/QM7282410662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a71966eb2700a59cc861afe9cd7d533917d5a1a4b0ca2dde0fcab2414ddbddf. 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/QM7282410667.