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 0xbe6eb615de7d2cd5e37e0fed9e7c7283ecdf386b79d859da666d33acefeeb87a. 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/9e6f06af-947c-4d5c-9f49-1dfabcc020a2.json and https://artists.proofprofile.net/proofs/artist/9e6f06af-947c-4d5c-9f49-1dfabcc020a2.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 0x20d670a4ca564931484e90b2b94825092cc9faa7e4464f750a1eacf594c77175. 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/QZRP52451019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d670a4ca564931484e90b2b94825092cc9faa7e4464f750a1eacf594c77175. 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/QZRP52451019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0b220414afb75395056bf6abd86109be0a86dd125ccbbf0db266e767ebe73e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB32445198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0b220414afb75395056bf6abd86109be0a86dd125ccbbf0db266e767ebe73e. 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/QZTB32445198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed29721bfc65cc9dae61ac9e6815f0dba52783a65a327806333426bf3d50bb6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB22492086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead28bf41a466838fe623dd07c1e4d5e792e6c98c42c8e64d64eaf694033d79. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTB42443136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead28bf41a466838fe623dd07c1e4d5e792e6c98c42c8e64d64eaf694033d79. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB42443136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309796c6f56fcb7510c5a1a04009e68ed284b22cbf40e8ee2b6991abff970f11. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTBA2498841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028b166f557a669f44cd096118e2b9d64dc371deff21a1d1fa8dc0195c1b2d2a. 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/QZTB92444767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028b166f557a669f44cd096118e2b9d64dc371deff21a1d1fa8dc0195c1b2d2a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB92444767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44bcd1dd4f220e854baf66c0041a24e16fce049209f968ad3710907e314b53b. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:47:07Z), 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/QZWFP2455609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44bcd1dd4f220e854baf66c0041a24e16fce049209f968ad3710907e314b53b. 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/QZWFP2455609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5443d80cce17a2143114953995db86a5a0a4cf0558505f1376841d4e3b4ff04. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZWFS2456170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2493041fafdcceaf3340ec78359776ccb57151e5bdcb7188e5d3e8514c2bd6c. 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/QZZ7N2460418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1c25c9dfaf6028fd7a660089dde8150418b2af0ae69ec360b7b62bdf5ee5f5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ7N2460419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4974adf0d455953cf6a7c1804b2ed8a3e17c2d15e55876827add91ae98b2c6e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7N2460420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf4e7f10d52adfd337b51b73e6dc88b9953e9b70ef83ca63047b6045fdedfde. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7N2460421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76922c8f3a40b6212a77b5643c1502117cdd012331009b541e58a8f889160dbb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:01Z), 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/QZZ7N2460422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de41b76a3022f15cbb3ca5ff6f823defbfeee24fd914c2b473d93d5696b47ba. 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/QZZ7N2460423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b8b4015eb9a00f755be8c5f27607d5f3ae7cce27887fa7d8ae4cc7fa61a8b3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:55:54Z), 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/QZZ7N2460424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d03b11374b8c3cdc9d8f78a80232dd0905ed659a72f0cfc98e4e46e9def00c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7N2460425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe0750052a401a82d5e8a88cfc529de806934b1f1ad173e47a295a053e6d135. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:47Z), 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/QZZ7N2460426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79c74ae7e79a90983f211efc4d32a0d22ac88f91963bdc274c42c7b34bc1740. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QT3F32426972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af09bb365431d85d2503ec88d70de424010906d726244b544229a0d1a8d9f97. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52506432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51939e0eaa95918107c0641fee48088ac4eac21e208ada18781070238c771cb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES62517814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ff3af3f185acf3b611a566fd1fbb7450f180d4b5caf51087148561af2d356f. 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/QZES92559014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6d394d53ebc9fd9d68cafe3b2ed83f2ffcede59ca4eac7ab978aed649a6827. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN52578259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e38184f3b2b1e40aaf815dbecc11a47a10045d781943f5946670e727bb51a2. 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/QZHNA2526237.