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 0x6010b1508bebe8bca6caddaa5f81731ca3b680296dde7f26ad4624764f6d997b. 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/b9c3782b-69db-4eb4-a6b6-156249543dfb.json and https://artists.proofprofile.net/proofs/artist/b9c3782b-69db-4eb4-a6b6-156249543dfb.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 0x341e51b0eb1659f245108b0c0e51f128d3f94d7810a5eea54134bcc95589502a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CHUM70900668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a37d76a2092b4854c18844a77e099e5c6fbd9109c960adf3c571b559d50f4ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac07e76f436afcb5e2ab179b53e813c4ca1cbe2925ef6551e76f286807800d3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fec27a49dee5fe58f2ee89f25a7241be208f4d06463b1367d3176b0d6ce6b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f117e90a31346dfe8a39312d3a20af682af8b7288feea9fda6770611120064. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHUM70900672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07928d54ce6776c47edd4042d6a6c4cac60ffba5256cb333518a04b05382c1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c4b7a21a358950159b7d974d992c2d178eaf39394842de9b3619b5c6eaa88e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CHUM70900674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a53afef060250610dcb081869b685e8fe6052983d1e4144e759f8a8489a07ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b3353b6136c219da2cf8c8a02301b3618092916c9a708617e12a9140bb916. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e918bb1c79b2f6c809b5528cb04c97c5aca84d53481fe216bbe5f0d5543122b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066b4511236fa33a18163abf1a2ee6fd7281ef6c521085d6c5b34312c6d8e41. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09b6252a83f5756f712ab50cdfa6751f14ea96c4f099123b6c18f4a08cf7faf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CHUM70900679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c37abb55e94b0ba88bbba740b1f26619a03603cd524a87d2c6b4f3ac7141c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CHUM70900680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b4fa3face4dfb59b15aeb298314a8a184f9b7c4465e9bb402c4cbd4f6047d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18cd326daef99d86c9695916f71b054d6319d5af0272f9a452752971450058d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CHUM70900682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a1e5dcd5677ac7321304cacc7b47d0bd455b4d7ca645cb89b9138f961f60a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6160700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893dd221e8dfecac9c3509dc6b312f18cc4df6daffce7af5ff63efc48b56ee9c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CHUM70900683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3457a9110336d1bcdeb95215f672bf040891470a962a39a67e08d19cbe65371. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CHUM70900684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07916043f80427fe0b088fce4c437d8edf030df2c273868d5466444c347d5454. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CHUM70900685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdac6e51d65c94616e119d24021d6ca748fd4339152cd8243f4d224f3617ecf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972835f8375e266a515bb180c011026cb3294658c0def13693dea93f327e2a4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CHUM70900687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc1c70010d53cbe9648e5432019007f178f36360b75f9414dccfd497776dfe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CHUM70900688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3e1d498ccc39d95b13affff27516e3810f175723afb5cb07e2a4a484178166. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CHUM70900689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3021bc386917af693a03a48dc6b9654fbe4504cf5d524ce711980a706894f415. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7375d8e1611a24ec1236748dc042c260c6852a82b3f268f979676e67cf58b2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CHUM70900691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd186fcf492ebef7a36d020e0d6e221cae62220b7366422388d943f97bd3a1c. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CHUM70900692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b468f52e39c3deb642bc19f11213c279b56abbdef31bde5a25cb7c13ed51df. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CHUM70900693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8634ff997afc8631096eb894e78d250a61d7df3e5da424e59736b9759ad4702e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CHUM70900694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc6f61bdce71256e186f7fd4ae7eb0e29c8a99305e28ad2762e18daace28ea3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CHUM70900695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f490997f560a12ef2303d816d5874cb2df47b678f6d9cb345b4bcb1e97ee54. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CH6160700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12256fb8d4bfb402385968f649cecd5ad782275294ce5ec3bf3d80f898035047. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CHUM70900696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f92341d26720a0150f38f16fd7ddcde832d992def09eca40faed8989db0837f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CHUM70900697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1004e13dae02446a65527ee832c564f1650bf97cacb2bf5ebc402c419cd3f8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CHUM70900698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330a04ba82dd0824e059815f46fd6c9ae91808afb18483dea85ba9ec74682757. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CHUM70900699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb70f334453448f3ca7b21f582aae43c27b96bbd8679bc6af3a9f937038c8771. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHUM70900700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7039cb1d7284d57b08a8a6dfb18ba9ffeb9f8373860ea43b5b80b6241748667d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CHUM70900701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a452a2432bbf71e8b2767bc651fca1fc1ed1dd887116517cd78c7676f7bbfcc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CHUM70602876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6740c98334ca55cc6e30737122d2ea9a6611eda94dcf232ea99084d7916bae. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CHUM70900702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9db8f8244e9118bf8580d51d55502abf553ca52c920f6336ff1ed6f3be2f6a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHUM70900703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead5363fb4507713af0c9469d3f7c5ac6dd0a7d779ca8077e82d1e0d4de22566. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH6160700093.