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 0x5d83cb2efe849c14cb6c002496128e4f03140d287c9a9d99b8b969f89bd76727. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e22b09a3-bbdc-497f-8723-ba6b2b910058.json and https://artists.proofprofile.net/proofs/artist/e22b09a3-bbdc-497f-8723-ba6b2b910058.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 0xb0f7245337c42495da4f333b99f6a384ace166c66e6aff2bd4d10d0d943f2201. 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/TCAIW2409972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d477f23300c5e77fcba253a41523ce02f44fba4306f550566ab09b8bc2b314c. 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/TCAJH2537788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a073c8cb475cb24eae1cd622ded5a558218b051e6ce46e8306be50ac65c34c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAJH2537804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82721ae50aab2814ba225761ac8303be8acdb1fc176df4e1aabfbd6f2b853cab. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJH2537815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ea76a38625340ef1e6add2d77be7dd3acf0149d684e43e152e0fec7d5a673. 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/TCAJI2564513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5566a080441efc2d80ffd5733f9e1fad31c33b850825af52b89802c90cebb2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJI2564520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49a98c0264211006b3e246e8036a0dab9491bf274cf696ffefeb6431daf13e1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:59Z), 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/TCAJI2564524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d2b2a85899917d751a57a10189ebe7d0a452eef589de31c369f159fb875be7. 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/TCAJI2564545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f42167462acc77abfef6341ea56069cfcc3ac021d13d0ffd1747b582205b8a. 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/TCAJJ2564564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68818d3432a637d0f33a3e58fdb30752f94a5506caed23a5b8ca9b5780e13a12. 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/TCAJJ2564570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0706acfd3582b780222665ec3bd22e4c45199bd3d1aef0510749632dc9de0. 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/TCAJQ2550238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f35c22365637dc800613e356e8a8bed0fe1994b8ce4c51c7a2aee1d07eb5ff. 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/TCAJR2550248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c49f4eb4f52259ebd0357106ac1e7f1a9aca71a7975524eea4754f05d010456. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAJQ2550252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b5886f5ff74cbb001e58069c432b00a683ae2d253672665074f5075f3327f9. 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/TCAJQ2550265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550a8ae98982187ea0c8ac6e09008242b4c9ddd3458374e0cc67fa03ff344086. 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/TCAJQ2550272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1cb9f73285ad8cd6ce697068cb6ef6924f336622a16ace5cd59fc9083a1ac. 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/TCAJQ2550290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6176418e458bccc0c6f802686f38bf5e86491f60ada9548cdf80a32b506447. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAJQ2550293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca2a29b0a63d9399c3c1f2bda1973c7e5d3da9c9376b99f3e4f4f572af635c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:17Z), 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/TCAJQ2550297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39b1f39f37706bfd7966547e1de25043fe054646b7f94aa5d26f35c2fce7be5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:26:16Z), 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/TCAJQ2550308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d8f31b8cec469b262db96cde62d22512d357aad695ba53a9060c05fcb5414b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:49Z), 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/TCAJR2550316.