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 0x5773547999da140ed8a150b72e5cfb3e70dddee1e417ff0b501158d9635c9a9a. 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/cfc5055d-ed83-49c4-add6-f95b85f96e39.json and https://artists.proofprofile.net/proofs/artist/cfc5055d-ed83-49c4-add6-f95b85f96e39.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 0x26add3f9b99bee55f609bae3cca75a7b6e1bfb456d3ec8e19a3303e616edafda. 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/TCABS1308515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835daa446337917b142dc419bfe51fc4626ca7d14b2bdfae8749f08b340935b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCABS1308543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dab24424c891f6427933a4eca770cf7c07b57783a2e6b9530f38372ab18360. 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/TCABS1308556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef3bb107cba73fa6ed3030aa9231185cafc440ef05db10f6103a3c496889f26. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCABS1308563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3ef515efcd01bfe32f9e26cf7164ed92b3132354f390b32e2f87d40f78794b. 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/TCABS1308566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fbd980d563458a2ac8c4781a1c5c7bada68b54dd97b501c56abfe3357f18d2. 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/TCABS1308567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409c6cb76244e8f68b9ee695dd4e562946ca36fa2d98fc32cd98aebec753bb88. 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/TCABS1308568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd02105b4bee7a6abc2464c1759bdc7e5e4d26675a8976bebde96a90ca40445. 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/TCABS1308569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b061fff573f7e4709f96e9be412ea7d15f9db8dbb9132b16c95956ab6fc24b9. 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/TCABS1308573.
Una En Un Millon (feat. High Class Filth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c2a14431045c8b2b00549510d496162124173ff1fa18ab6b843349fadde18a. 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/TCABS1308577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6ee730abaf7a38c1490f595f41ef8fd5f1f9bb8758748de077cde3cf76eaf3. 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/TCABS1308578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f31ab4fcc7c2b29cc525f01f0f164d41b958e607c5bd8a9f33792dae8e5ead. 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/MXD781700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ae7c234ba40c462ee317fb2ce02a842ac807c44c7058629b6c5923280ef176. 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/TCADQ1884374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404e0df95ccf3dbae659017ba752a38b34ed012289536355daba043057d0cff6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCADY1863386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d61b9c40fed0d7215fae4a61a8e9114a2c2050def17c43741277b1610cb114. 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/TCAFE2025324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1ab248900f4880667b48cf8c5b4ea47750f86703b76b60de6985a7b6b93588. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAFE2025501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15edc822bad655120205fdf842a1ead4a657fddd9b8c240c957e92c6006056a2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFE2025517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c3b3fe6871fab409da38896e779648196c86b24e8018a4ae43326b30934e39. 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/TCAFE2025529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4efa26797949a2dfe7c734d5982c12774c9c79377e5e3452fc8c9f185b7004. 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/TCAFE2025538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fba9d6af639510e2a75d39a5f73e2fa3c454bf8f89aa24a960c52a8ea5d421. 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/TCAFE2025669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc649942d39ad5c7fb520eb2ef1539259da788e548ffd2c36c3713fdfe88addd5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAFE2025581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc406dd2b48a0930efd68d31f416302f6c57180e852f7e0590fc25f1a40cb5981. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFE2025605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb46ad8038f764b6be65978524dbd5da716be331f388db32e230a53563f7ff. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAFE2025609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b198bcf330dfa55d0e9952c10473472489f73c3530af59977c91148fc5d65c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAFE2025624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90d2e9a97e141abaf6be9765329c09bf8d8e8c056d4f870fae4622409f34a3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFE2025630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc385e2080ebf552418aea5d15bc53292954254c10ec5caa27d2988ec5398eaf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAFE2025633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b48a6fcd50e3f0ea400657d23891d331eaedadbb87243614c54f09d539936c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA72486990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2949183ba80c63a4a5d30003ec358bc9c09078be70b45369f56a969a2489e2d4. 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/USUYG1061961.