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 0x09cca206f86286f20bc4e57839935120a8f3216bfccd90940fb99e39a819ec09. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/115b1bc1-1b33-4f2d-be1b-6153b87be7b2.json and https://artists.proofprofile.net/proofs/artist/115b1bc1-1b33-4f2d-be1b-6153b87be7b2.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 0x1b9db9d1ffd7d9dea07ffe38da2c08de08fcb46b8cc00555fb3db1425cbe0e5d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPW462544272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741031f6650eb00c1f3c26d0c6c1c4019fc8c88e8d9d774344e58195d2bbec99. 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/JPW462544273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fbe0b9f5b02ca9ac36584ac31c065ab257298a12c3b23e6cafea138acc7aef. 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/JPW462544274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e998f54a1bae63363933669f141a97212be58fc81486e6c9cad4fb0023d8a6d. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/JPW462544276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda562eafeac7744d53af783944b3e8699ce90a30f7583233a0e49846abc261b. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/JPW462545076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7d52a5c52e5f0353dbcb21296c66904e1065eb748293fa6d8c4bf7e9f79a41. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPW462545078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48985dd3cb25fc8a25f70a7efd2fca2a2efbef3079d49f79219babb729891863. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JPW462545080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e28f97dc7ebad1eddbdb5dfc35efe4597c13b8c767b46c34f3c2680784f3fbe. 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/JPW462545381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d94ac316ae20170c6695607afe45da30399c5f1fd070c98d433a46afbf0492. 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/JPW462545383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f010302981c68f6cbc0daba87d57030eddc13e514fe3ba17061e1c950b7069. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/JPW462545385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a71b4bfe953dafb6401fefe20131d0cd519b25b39122b270688877195bd5b. 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/JPW462545071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1680e5c0af094ddfb6968b89c4bef86e40004a7e2a8c4c09456e6e40209c819. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/JPW462545072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fb3f0a1b9227b511929d0e96a5dca3d8296aadbe89e17a09cdddce3f9f9fbc. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPW462545073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb436a2045ec26650bff9d74310f9badd81bcc52c0822917feaadfec736c9d49. 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/JPW462547540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83775924fafde27bf2a015f3ff1c8e339afd6c5a501bd9a99596815a8073a89f. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/JPW462548695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d648d07e128a9cc07be4be1a1643c55d5d3a902d02b7426b0bc87a66bc2480. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/JPW462548696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825c03d3583d8df82119af93965a06f1efc5a7558f4abbb07b25a06892ecc36. 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/JPW462548698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad05f6b3f9bdeef594fa6577876b8c7240915ef4c532c1b950e6cd805682eec. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPW462551303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61326982b4dd1744f3bd42dc8a7d6c461d11993ab6f957ea4faa528f5a7a37a9. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/JPW462544597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc594c0e2247bcf8e530ae224c30dc494eba63b37401500daf321bdbd7c7e3ce9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPW462544598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2b5d675ca2ec1e248f2adc7e3217d464349506a15f6dc17381238df66d0b7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPW462544599.