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 0xdf86c3dc4d8fd612b9a52e502ad16ba15c33ea70f0eb325f6b80d4a123e85316. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c02fef0-a641-472b-96e6-678c40b22ee4.json and https://artists.proofprofile.net/proofs/artist/3c02fef0-a641-472b-96e6-678c40b22ee4.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 0x0902eb4ed063b5f85a8aee4c83bf7e1dfe1442aba5826ef18af862a3d540f1ef. 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/SEXBA0700806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2f56a2921040c2720489250f97ce63ff149f2cedb73cc217d30d657db4f11b. 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/SEXBA0700808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab2530f9b04bed7a75289c81eceaaa33deb9c66bf8e3d466985df45dc8ae939. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:54Z), 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/SEXBA0700803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf08ae149fa99617356f30db9317fbdbd6c6549ae84e5c355192b00fdfbb7d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEXBA0700809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf04bed3c8c39d61d92018d7da972ddb573c3768be55f5ceb67ffa38828f9632. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SEYDO1000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6b10bfbe4d0b4eaae3056ff9ab22b4750534a7b1f5a0404470027e4b4bb43. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/SEYDO1000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e739140efaacd6c41861bdfc77cdbe69b530f4122562f60ad3825ec3e6aee88. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/SEVSZ1202502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bebb86cec27c16ab8535892cf814573d019e8fbf4c8c8e8e0a0d93ac1ff61a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:24Z), 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/SEVSZ1202507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eea0856aa0bdd479731dded03fa13facc3331fdeb8c4829610f343b66490430. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:31:23Z), 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/SEVSZ1202509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73df4ea602df5820a621b0b3cdec07a6efb29db29ebe23147219d1e3ce1fb2. 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/SEVSZ1202512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430d95c513e532b7357b4833acc61a88270819cbe224e4ed0449ec504d51778. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:54:06Z), 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/SEVSZ1401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83b93b5efefcb97b7b68e8934ff82f165429b44ed32134e7459f96d586b2a77. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/SEVSZ1401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c13bccb2940205eb83676c1e87484c72476a1db7fb223f90729d27bd31eaaf2. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/SEVSZ1501601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1b1f2f558a461ec323c783a288dadf2a4c322959b120fa0a76a352f28e2679. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/SEVSZ1501602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a77dd49d911afdb7ce4df374b4d801e1473249d8195c9557aa29ea95a7ba46. 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/SEVSZ1501604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7015d6a0ea56b395f5ba018aeb0c57413b830ce040c075df455a4eb9578d63a. 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/SEVSZ1501606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9a1042aa793a3edf6d7746417e2c81540a0f8f7e450d86dd8a86a867681ea0. 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/SEVSZ1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb41e984f524af6e7f7cd332759bf50b3b284deb98fde3009aeac0e54fb2da9. 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/SEYDO1000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7146c7fbc1a1656ed8c7f10a3c774c8b13afb8db339b0f8cfe1b3e37e12bd2c9. 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/SEVSZ1700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5f9b115382505e998487f93ff9422f3589a66be3c1990bd9d461bc4f37cd3c. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/SEVSZ2203603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba53c03a6711a39fbf492a568c2fb008485ac6732fa0cc410eb5d626539b9a2. 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/SEVSZ2401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b45f05fab9b5f8eb80182ce0b1e9c7624f13b2ec2e2984102af2c90ac200fe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEVSZ2401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d4cffa3d53788b3f28721a37aa66fa94e6eba039ef1c7de4f9525e2a194927. 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/SEVSZ2401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500791c5e2034c184c6810badc855347f38b197f9a91c2a49229bcb2d3e08ca. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SEVSZ2502003.