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 0xde5deb2a1578ed3f55554c58ab3eb10e2629184ef40ded500d5eaf89e0e1689b. 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/6e04ece4-93e3-4ff6-b56c-fa1a7edf281d.json and https://artists.proofprofile.net/proofs/artist/6e04ece4-93e3-4ff6-b56c-fa1a7edf281d.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 0x228042fdbfa2416c81122c0d873c2a9bf1017c3f0890cc1bd9de21dd02acdc31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWD252050725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217c96cd50b21ce0e912d97a0809d5b4bae2f052fadba5b8e467d7a4059e8ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWD252050723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e57bb3ecb619702c7eeb40d55ffdb7a56854e040c1cd0f7ab8571ef93f6e67. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWD252050718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c6e1ebfbe9b6f56f7152d7ea9de0a97985bd5570a78cced988b9a424f44c7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWD252050724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c51d8a62be5767e6d07ee5ac38894f48bf3675db6d84d05bf26b306f5230d42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWD252050722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054ddca240201b1951e90165a290456d1808d533d3c3ca1f0d507fbf77694e07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWD252050720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9986df168734b7cc7e527aa5f9788b63a2542043310a08390b6babfcce6dea47. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWD252050719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe988e4f3b17ac220eac3bd803a3d4e974d4bd91daf8a467445cce4c7b11637c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWD252050721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487423fa2444d13fa1f7861a76058ce4253b444b2031afe348d1f8b59258d6f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWD252050726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c52b907c922128b7b6ad31ac445755aa82d97259673f4991fa4b5b9b5956d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWD252050751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e4e0e7c13fe52ba1cb62640fa971a028c74c401ede1a88926151dd8bd12ceb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWD252050753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4609cb73b1fe99081f7dc75bc2d95a9aa64551bad2fb09043904bcbd5ee1febd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWD252050755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a470dc5ef67579a70a286a8dc3c226a0858d49cb19308440cf1f37d9adcc005. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWD252050756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12884102c95ddc9bbe961ee66c3f54137f2d7066a66b63a86a14a9a132ef0a1f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWD252050759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0475f967a677a3ba49a40223d098cbd8b1143cdcd33ecc822dcfee2dd11e4938. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWD252050761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999bc8e02d8795f420ca9765b4c09e32b433c7ea3d4762fae17bc0eec3bd4a48. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWD252050762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83f697060e868a79ae1802f09001ad364995c54b03f0de034dc56bfbb28220a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWD252050764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daae29d58171683fb5f0b9f9c6646a364dbd1767e720084c38af023551b849c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWD252050769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04df91523ea18671138a0077e53cfbf7ef201ef4127f03aafac55e80754ced55. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:46:49Z), 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/TWD252050733.
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 0x63170b6e24c04867c12aafe29ecf9f4e495ee5e30158c28dc04d17b658e42e68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731764060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bee7c023bc679cad1e00d859dcf3c26d27ff26cad1f6b91548be584e2573b41. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKG732147209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742471112a809470701e313d44cdc501756e5b3432a940e8198394ec4ae6d9a8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWU712205499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524bdf5d6e1ea0b712ce82ef8a6871a7c5dcba39106318efe7c75bcec589c70b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FRX762014895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266922877407139d5930b4b87532d135166048d5f218f84113ee095b62957c21. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/HKG732278407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b50b088dafdbe1e61019b1c1a0698f57b46ad3ae5bb69540e90bd8d934a2f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732278405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbe792aa9661210ad949005cffb3a9e956b8eda8b3f6fe8bca86ab78540b4cd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG732278413.