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 0xff2efbce73593fc5f6f1602791a20a11b681b1fb6b5b99a2c38e8d2ca85f11e7. 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/74edac8f-7a03-4d43-8337-803b41e34b64.json and https://artists.proofprofile.net/proofs/artist/74edac8f-7a03-4d43-8337-803b41e34b64.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 0x2b6dce2edc4357631188b3f4d19efd97a693b5e89f222eb3f4bc4c7c2d059864. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNMV2292700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf32efb9326b893390bd2f54526d5a6fa7846750aca864484024174895765e08. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CA5KR2376974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfae79177b703ccd71f3fcb7f3a325b089baff1cc08fe6604e2b99331d3ad8a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CA5KR2386777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786167dddbe4e48703dc565518880eef327f1ebd9d3d116d12dee24cb999bf43. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CA5KR2395147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a06d55a1b9d7fe08206c95bfbc0b263ce212e6751c5e8d3e38830a9495c517. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CA5KR2414179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06cec1f59b3b2183f50289ea7322196b09a1e691c18737132729b19b0f9878e. 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/CA5KR2418750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317604c9e34458eef3e5cc41b49d58b7887095365217ce9dbdd67653f95f3ec7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CA5KR2438486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3895a6631761acc2891d84d1054674195c8fc14e47a16c2abcc374c01abdf5e3. 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/CA5KR2445659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d45882571650acf253ffb6df4f9830bd0c4f104f2be3f67c48fb637969506d. 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/CA5KR2438485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18cdec68645b8e3cdd06d3c3a33d998089fc24a93d3e0415fbbaaafafa624b3. 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/CA5KR2457450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8605fa6323aeb2be71c28d23db47b9db06ed2bbfe224f4e7fd3f04055e6ceef. 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/CA5KR2457451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ce32b1bdcca13626578f0cfe756595e31f68e23c815f9baa7e761dbf4e522. 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/NL8RL2429535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ae7765f2ea65820e05b4b63883d189f29b6ad9e629958dea42009eb47613fe. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/NL8RL2430411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4756031a52dec0af86efbddb91339f9de7da112fe3ca3de602bd67f6f97672f1. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/NL8RL2431787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93fac60a95af2345b8d4dd61f75a7c4d824cc56d97ebb33fb1aae5d70b8b8b. 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/NL8RL2434000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bda5eb165d2db22a6f79634211c4b618194e63599f99743ed0e3b36abcb6dc. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NL8RL2439936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7e9fe57735f6615cf27b8746530ef6dcd67cb6adcd2011072dc36c8dc9105. 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/NL8RL2439937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd33d7c6bb3f031b8667d82cd28141b57ab43fd1a59d23459ebd87616e40eec2. 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/NL8RL2449971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a060f6777a48dcbba9dc31d3e690ae4b6f844ed77403525c36caae20c298d7b. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/NL8RL2449973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e2169d62ecb167f5047aa0e1f6909559142c80acf4720d29c52993028af6a0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NL8RL2449968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904bb09e27b2accd21e9ec4238cf98f92087db9f4681d043d5c4419208d758f4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NL8RL2457346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7694c1cdb4dc0e87cd80b622d646fa66a80d3641b94b714f25531944a8181df. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NL8RL2508507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8472ddd0c78e366171e9219366a503495f6fe5959e1c8f7ada097ae4ae59e54b. 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/NL8RL2510885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f5a0211726f2f24a44825f2db9f52dd2607b6235270952934bd91107745a7a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/NL8RL2522137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719ca02791e8ea84972a2b0209af3ae5fe32f9391da05794a4565b6e507f711f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NL8RL2532289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824a41115b675df9ab62869f856cfb237c66c3a93466337435d489d7ed9e2f08. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NL8RL2532420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af43665ae8f774834718097499c46e101c622fb0a19bb70807805b11eafe189. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NL8RL2532439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493f978ac6ddfc7137afd12465fbb24bf1a1c0f07c08252ddd7fc4da89d183e3. 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/NL8RL2532440.