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 0x72c7329d995ff252baa921dabcca88ad20b3a3a74d56071c544bdcbe610a47fa. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42915e05-c142-4fcf-893c-675eaf0df7c9.json and https://artists.proofprofile.net/proofs/artist/42915e05-c142-4fcf-893c-675eaf0df7c9.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 0x056f7bb70a6a4586f07f7d6f929bb095e4cbb8aabd9ee3044374401b25e0a259. 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/QZDA82360235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aac24a2787e3f13746281cb305958dabf27079989fca27a5f35dc26963bde53. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:40:01Z), 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/QZK6Q2340332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc728227a50523c31db32671489b272724771a8fe209947d51c44bd699731cb4e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:36Z), 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/QZK6G2329880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191064e9a577f64d9b1c892e4d78cc6e4abd7c42e477ab9f643283f3defecb46. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZRP52343935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60713d255baeae55ceb08485669fbcc52f86f2059159f8fda2bc93ed3aedf95f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:03:51Z), 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/QZTB52389703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b534eb48a9ffaf1d96544cb40084cdcce2fe0676c5a620037b4b3fe517b6fa. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZWFE2363465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7180b05a79b0b595f73aadfeedf494149166894f23368366fe25bfe252b68978. 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/QZDA72445456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12062be360033bd2ff8177c720b7a52ab686860119a937dfb1ea9cabc2d57231. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN32496949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306afb0a61a91f2e26b0a04bb35239b1d9f4f0fe40e25970767b01fbfadcd41. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6N2433670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc17e88dd0be23b87d31ea828f0b95ca2b2ee4795a5f914662d564399d61af1c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:08:47Z), 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/QZK6L2414300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e0a0ae267aacb6c35a104baa208ef861bf9ebcbde5f8466d6cf00b5ec7fbd1. 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/QZK6J2478196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97759833b090c6070f4fa7ebed006870a0db115a06cf348777cc205675063102. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZMEQ2415587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ac2818723ed5c9ca270055aeba2322e91ab099e4b1bfecf6cd15f75a73c28c. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZMEP2492461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04821d5e33c54c508165660c5642b29aee96a52b0fec37c1b99dc7fee2b76e. 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/QZNWZ2417641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1753369d2a2c0df7c9dd39df5f423341c38857b9c081e283892dad7cf8bcf42. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN72535701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f9c58ca94f5f9d92ffe8957aaf2dad5508e63a8fcdf8e4357f9d51f0b9938d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWT2591658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c87b3bfc2fc61805244fcc19e0bdfc51765a6840a769ecb2a2d3c7600239d37. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3FF2552522.