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 0x629597f161869e594a2766dffa7fab337e8b05881c29e07184a0196a2c7ac414. 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/b77c993b-aeb5-4fec-9e39-f4a776df287a.json and https://artists.proofprofile.net/proofs/artist/b77c993b-aeb5-4fec-9e39-f4a776df287a.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 0x63d4bbffdb4a399ad3f03aadd726d2fdb7140c63281b08f40ad893779a39cec7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWR2225704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e97bbc41d882b2bb4075fd76216c18d6bd604751a13cd60b0df50b470dc629. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2225706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef3e7d945ff5abd2ad623e8fa34ff4ffedb1d174bcef463a11f59f546a149ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFM2362195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33151fbcecb9ca1029bd443a869867bb76f8eae2fa59e0c3c75b890d7a4364ef. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZWFM2362200.
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 0xbea30d55f58c17260721592446ea32a682c476f68a5c3cd31ebf8f3c6ba453ea. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZWFL2320963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ca1b4b4bdfaa54d9b39a7c80b7b3e24d2d4fd2cb96d8be98d4367a76b1f97. 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/QZNWY2420724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db6f225d9504bd0df862dad2198d35ce6563b85cd0ceda39590d812fc10a2e1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWY2420728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf787ee1cee62027147dba4c270da78c44d735126532d3432501ef6bfbbac3149. 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/QZNWY2420732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d7b3f95f5997f5f2ceee027eeef73b23e90e87ac1c65f68be6269af480f06. 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/QZNWY2420739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ef875da338caa5cb5ddf45c9bd1001061736a82aeef966d6823b01e966e176. 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/QZFZ42555494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e7d51c1b6fbf27407e9380b83fe5f714b7109ed0a5c3f3047ee583eb6074a3. 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/QZFZ42555496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b718691bc913e084ee0711aef9ed163f2c2e4ac8621c9fa5a77baf4d21ad07. 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/QZK6P2588900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1709f12adbe1f940d5c65f0c7442c27271596c59efefa26ea0c88f0c287e43. 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/QZK6P2588901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bef3b47e78c18f60e017cb3b56cf9dbe8458577fa07bdc6e3385cb61941719d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:30:09Z), 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/QZK6P2588902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28a6f174e698a3f879f80fe9b09bd62691ce0bc15ddeb1bce4fb075388b2073. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:22Z), 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/QZK6P2588903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6084fae948f15b8a660b831abed2bf330c632daa707ecabd93bdd8c842c1f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:31:17Z), 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/QZK6P2588904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3f278e817ac425f6312e7e2cdab83e495eb24a47067068b9b48d690edf237. 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/QZK6P2588905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9027f898ca806c4a366017d9325aaef7f366bca3e879f0a92cbc685d80ff1d. 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/QZK6P2588906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dfae7fbc371cfe1f21ec0551256ef6d5041fdf6076353364312c96725ca6e1. 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/QZK6P2588907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a893cba6c4a8be0034f5558e6f8b4eaa9d6026366c6cfed7d742eadc211019d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6P2588908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd3f5a7acee02004128ac7d3f4ee5ae27569fca13bce026b3c3d1ec1382b432. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6P2588909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101bee0917eaefa25d361efd01a50806394c38dc3843830c52ca437ab78a0526. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZK6P2588910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59759898d82685cffa712a8545c99acb8d3fe6eabdbc3ba75eb9d10bb205d314. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6P2588911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4cf75c3193ac097ad78d1008ccc7603ae869a012afbfacbb0b122959e345ab. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:19:57Z), 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/QZMEP2518861.