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 0x51a56f39119d3c044f2f8220e57bee1a5d7b7a766aadafd8544d88de6cb259ee. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/853489b5-29ff-4ecb-9a47-11ee5b8a07d7.json and https://artists.proofprofile.net/proofs/artist/853489b5-29ff-4ecb-9a47-11ee5b8a07d7.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 0xea52643a3c3ae1d15531b7291ac6c4d7885f5b664cccc39af3fdebf806ab8431. 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/TCAJD2586778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2531306a0081cd0a95e18fccc55d0aca890b248fa3d3c99bbefc1cc4ef57dbaf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJD2593466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9f450b6ca054ccc7dbba690c093598041c125b883787196b05a686f574247. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJD2593469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1179e7644fc2e8f872e2543390178d1b767ff7dc68c8de9890bf1ed713cb92e2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJD2593520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfc87859e9d32dc4ed5cab2ab849966e885124aa82f685ce67b66cd369b8484. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:04Z), 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/TCAJE2550733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04766f12282758d2ea3c0a6bca57bec09817caba35c96db7779454dc28fdb433. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJE2550746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccb2720bb2b0097ca2cdae0bbd6f353e2e506be97f14ef7978a0c21c8997cef. 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/TCAJE2550748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57083be57e0ce37a2ff1033f068ae8e5e1ca839b1e307b98b3a7c5f64b3266. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAJF2509068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224fa57b9c391411a8678d79d84c57f7cce41e4d37586b6db18520475218a0ed. 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/TCAJF2509073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e1ad7b21c53a39fc71c62c3fa2c3e7bf93488073fa443130f6a84c97bd5494. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJF2509082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0465327a4d3580c294ee21b0b14eba454f03a62da834bcb406de9bd8a77377be. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAJF2509088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358c7fef590aa31998c483fb039b066b77bdd46b3453b8bdcdc7dda1f4fef3f4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJG2511827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c3f877a3b71f9aa0227a4cdfdc62b32781d202f639c59e8ee64ea89f6a400. 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/TCAJG2511837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9427d70de61b61f612f03ca47efe88497c5f29e4d205af95b74060e02b5d96. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJG2511847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32978133de66cbd6bc90aee6c8b4ea757f2bfd27b5b720055429715dc9b10136. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAJG2511852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ebcd1f30723c274537ee3c1336a45b55e74743f3cb39bc7201d0a2aa646466. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAJG2599626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c19d7681013a2b492cb597959672a5d6756a54749b72cad6540be3e044bb6d. 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/TCAJG2599634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdbc18366d833f0981b583baa5ad2bed3c8cd43cf21320261e436317993497b. 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/TCAJG2599639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767a42ebeb8d17b145fa92a4f8080ef5658639a382544fe7bf2d7f8d6028657. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJG2599646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d438e6541b48046a685cacedc549db8819902062fe93eb78bcdcc297ba41c. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAJG2599648.