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 0xe112f51376c9e427f56f7600aa1ecfc7aafddf9be1e1bb548f027925c0f0d321. 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/576587bb-b1d7-4aee-b6e8-16d8d42eedfd.json and https://artists.proofprofile.net/proofs/artist/576587bb-b1d7-4aee-b6e8-16d8d42eedfd.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 0x334ae8fcbcb22264fb5ba415415de14c87b0347d9745dc66e0174d3edfe0f6a4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:39:40Z), 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/QZZ7T2480723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c469b9e271e8567f19b401f65c4f63b95c0524475442cd1f92be6c3c06fd6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7W2432584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33b00eada673aaeae34919eda347cf427a64de98b925b95bc7c50c67b6a3a35. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EX2445959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57dabd315f001eef7ecf20ac022858865f336a208febc9ace1742305bc0da21. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:35Z), 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/QZZ7W2431090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46243a34259c4ec9f6bc6d892b1f466cc29ed26ea3721060c5bd0e42e6179b4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F22421646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891b528bcb904486ef72925c80aa9a1005082f6285542c6ca703f3dc96c172f3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F22491684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c055796621b44da56862a593db59269ac3063a3b9003b8e61cb067d7a20d59c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:49Z), 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/QZFYZ2562382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea410572ecadfab1daa8a211bb6bc9a370ba016235565e61504c7729a233e4fe. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ42509944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f70e145cd52cc13f5b57397a14e21c86f158b586a233a3d354c983702ee1df. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:40Z), 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/QZFZ72597925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bfafe01c6c44962318413e547c8e6270e00281ae85fb1ee0a839807b0ff669. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:42:04Z), 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/QZDA52511618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae799bd6f1b3251762a472571cea2315096ec8d7b6277ac0efcb6d8ce16440. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72558863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc074ae06a1bf017a2b18fedde33a798d00ca347493f184ce6fc4b8613f3ceab8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZES82589947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b0cbe9a6e09ede42c3661bff3be467887f59daba381c3dd5a6e7d3c0bfee1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES82592003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e40eddf7263feb7ac0de8e8d658b04258c884d9484cf53cd66c231ec714e835. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN62562425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e905ddea8525c7a62f6eb533a340461c9d02e561381ac192c337930d2c19f7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2503844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023c94e42832cbb7b28a22e60522b9eb05731a2fa127b630de912b4867c73eb9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPLR2524635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d9a86c78aacba4a8d486d273db58a32f2431a045f8668f0408f66a952eafe8. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZPLR2529727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f8d8178d183ffff77258cad32bc4645f20348e311c0bbd2a1a6450850d195a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZPLR2591909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee0b8d03e87c227e687282aa4e12260ec7ca1870ca9bd9a37f2d7cfafd0b847. 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/QZTB52506804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99f895fa6ecf6611fde72441042a71c1708d641145b630189e9ee9faac6d81. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:17Z), 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/QZTB92528775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2747c708f52e94a8f7d741a545c0889e14b5b7d20804645290b6ddcc253f4757. 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/QZZ762572276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cdc33afb2289bd246e4cc5ba6dba9ce903e9915d7119d990111904fc42e3f4. 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/QT3FB2565693.