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 0x04e1f2a2f7b2723886128e067d64dbd4d48f7da1a3172ab102665692e600e38d. 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/b6140df0-88aa-4488-b613-6073702c7c95.json and https://artists.proofprofile.net/proofs/artist/b6140df0-88aa-4488-b613-6073702c7c95.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 0xa6bbc40ea2456a7d5f27156fa37d3c4a2535f67b5ef9174d211f8a0dc53595cf. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/FR2X42303626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf241d0dfb0e69f4478356423ce3339ecde46c6fdd19d2779636b7385987d3ff. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTPX2313905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fb1197f7528128b03fd33f582b606950a1aa493dde7a5d2e889762f5f9704c. 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/RUA1D2479700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe2c850d029c80c9ee0509f9b424e7b35a07641358ee5afafe69782d084a37. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/RUA1D2479701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc9d452fa19ef26accf3fb9228a06eec3a8ee5136ef122f3338c4a02cfc5242. 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/RUA1D2479702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f959082a11f6c5bbf7b732fc14406d54d76c12f9cb39288add5d15a0dccbd9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUA1D2437642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44ce873c30e1ad3a35b569c430f6b1f2ef7945b8d4042597e2e9cdb7606d661. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUA1D2424916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36c2facc7367d1e677bb1e7fbd8f536a3d7ddb0734e9099cf9d87d109f9e02. 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/RUA1D2479704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722663c0f8704ae1729a6e26f48e17e6ba6e6fc2b02f6fd53cd158f1abb2f41c. 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/RUAGT2418944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb721c8ea630cb2be39fb491e9b6da4289ea3045689c36adf50abbe97c2d7ccd3. 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/RUAGT2434674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374839fa17ccc4c2c743c2bc0631a27e80151402b0580c4298c0fc081babdf78. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/RUAGV2500907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e12ddfc874c0978a5f8113908fe87426c98b9324de365070b5945ae4a081ce. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/RUAGV2502151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe33e9925e66fe0a85aebbca0b57a5595f9da233ad854b0ea76a88d6320ac2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RUAGV2411072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501ec0ee59ebc7feab485f87f5360a8baa293d9f623f3566fbd03d6a7500b6ce. 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/RUAGV2502720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5087dd722c74cd9e7acb6975912111d05876953665e9f8cf4868545bfaf24a46. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/RUAGV2502723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa826ed89a162473ce8618631fb1b5e5680400755d2cf0df19e9e2f2c1c597965. 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/RUAGV2502724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc2df7d6f221ecd4668d24f222669298b2b0f5fc3fb4859636693da5f2c5f1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUAGV2502725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83700fd39161c27d00dbc54cc4d8d1ab6178106ae0c3f05c07eeec3231f07e4f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RUAGV2508208.