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 0xb05614e4fda1bc46a12a6c8383277802ff1ce1dbc642b3b80bf3dbdb82d1a08d. 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/1044e3b0-d98c-4986-adf1-c4972539f1dc.json and https://artists.proofprofile.net/proofs/artist/1044e3b0-d98c-4986-adf1-c4972539f1dc.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 0xb2edee57cd255e24e84d389d4893b9b2a173d96b9d4aca02490c354f8b3b1baf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES51836667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171eef7ec5e5cc1450f3f5c3a4cf529fba5bc567366456ba76c5a2e380830c7d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA41977606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bf3d1ed7aecf570860e70e1e8e8f6b5d0b69d5efb018d7de7151a03a5086a1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZES71997254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48f38238d1678f9b91640de3c8e3be5c0703866ed9765fdcfe1378153ff2f1c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEPI81901831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3c36f2795766d8650234fcde80ab7daa2c49986f3bc86229fd75254eb6d9c0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH7812044244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf668ee1f9747e7433d29c9a5397ab8e7139b5f7537afe7744a45beda72835c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CH7812073802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89944259e3baaa14e062d7284c5b291591ebebc2c224c1b3e8b26e2ef0f29005. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CH7812196515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0950c40d29cb12f9fc0e5335ba34d584027dd9126068f7ea3b84242360b6a4. 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/CH7812193967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1bd6d263d33a0cb9545eccf7aa5b6ecae22a7c0f1359b04a7ebe4f00075d76. 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/CH7812198497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a177d10e74df8df9cdb7cd908472e04dfab5a6c70cbcb850961906ef582c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEYW82103559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef8ed64692e55513245a3277df1eddc50778bbdb21a2f914c576a2e8d0e0511. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEYW82104462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbfa610aff8d419d8fcc08d4313cb804bccbbce4c5e9b8e49fcef16863f6850. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEYW82105183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a499021e0c79f6ef43dd6f4a47ffc8cfb74af9cd024d2f7aef0bea5ecdc169. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYW82200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0efea6cccefd396b4d393a2d756d1236b975a2c09377dc1dc0cea78a5abe317. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEYW82200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c176d227ab0498e73b661d132910065af79801ae23bd6855de28ad22833c159. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEYW82201573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ac1e6c570f4c6d488198010797f03f0d9353767b13d17e26c8d13e575bc7ab. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEYW82203554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2103829ccbd71d0cfa24d6b82101aec67a2c43f37ad39b17dfb2244a91be40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEYW82205454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa47ee8f2b4c7edc30ef730c632f96fa062e0a3b7612dcd07213745113be0745. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEA622401842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b334f19848b863ba0a30655071c78f3ac3e6b790945254d6a1ffabc5637c4f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEA622402566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ee19c66ca1cccc258546f14eebcf4479610a21784ec92ccd59d93a116a91f4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYW82419155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1875d5dd7752c575452f1dc9632714da25a27632e6196baafa99a06baa03147e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEA622400288.