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 0x020c3c36048fafb2edc1227c677759f363c5f466ede57794eea7726476ae6b7b. 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/3d4eec33-bf8e-4a3c-b797-49cc88ee94ed.json and https://artists.proofprofile.net/proofs/artist/3d4eec33-bf8e-4a3c-b797-49cc88ee94ed.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 0xcb11526efb6aa561e52cc5ae56f422bb604de56c3f6237d2d314fb21b972c9ea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GXBDT2444442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d61481274fbcac285f5980a0fcb55958c79d9eb9c8b2d4bcfb0e17d9ef9b053. 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/GXBDT2447405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe160eb9080be130fe242dabfe593ec79a7ede93452cb290e8aff2d20c18b9d53. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GXBDT2401278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ffc29453933c349ad6f1b2316855c8a02c0a90cc643f32d589c2d994d3d38. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GXBDT2442671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352b816ed84b45f94d958a450b57618b2873632a36703668cac51c221f8f6957. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXBDT2471297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf6d9acd99b400f187b777da72f6e5307ae1029bd2515f1d91453c939a2ca37. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GXBDT2460721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3df5457f0b854b2eb65d6de90510420a5e1ec10f7da872ac2a1af5c010d2791. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXBDT2432590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454105f0ef06a20c1ae67c0ce639479e46546ac4ecde3943be6d56fe91634077. 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/GXBDT2400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30689180c80957d3acbff4e527cf1d717a57964caee1f37bc5684f58081aba2. 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/GXBDT2419871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e25d520c288b8231d689b2eb23d00a341aff6b1a873cb5d2e0110ca33c4991. 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/GXBDT2448824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc174ebbf1e186191cf0c95e8981057b5f2ac5e01b298f9cb98a429e88763a7da. 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/GXBDT2422439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf205d97cef43501c644404f7871e3c0666bbfaafe84e65456ca132fd5f8295e9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GXBDT2460433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f1428744ccab38a99fd5e9021082c2907dd7717cf0e45991288d1d019b65f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GXF972450965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95f6a2b033a7f07cb43a4d0981941d8f3c26edd671a8d1b062aea029b03800b. 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/GXF972408646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68ac6a481fec3416e2de51bb7104b36c66d3312b285fce24303ed6ffbdafe2. 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/GXF972415212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc156088558c651397242ce3ce60f839db8fa17ac1abb483968ed7ce625a49. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXF972409855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed565536a061068fb7f381530f685cd1c6e78503ab87573ed01d53e1b37d1d7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GXF972462169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bee21434186c72d3c140218d089a6a81952301275c54b23322ac4d3703a7922. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GXF972438055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df3729fd44994d222c8f711d8dfeb64e0d1f6904fb2bbbaabe8643a9c5514d0. 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/GXF972403943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274deb705dc21283ed2727f157a944ee41624f88d39562e32d731a1b77c05fe7. 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/GXF972455629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0c67351a0c21743e6d4d50e0036e7c518aff69b49110d39950a91125fae61e. 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/GXF972404583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc423e995aa3858dfb90479e155f56e7aca7c57108dc1fc43c71c60cb9535bd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GXF972402919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1246922e3eaa2125fa30731725be3d59c145296b98ea16611733b70d5e8a84ec. 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/GXF972432681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561caa035bae89949cddc990576043ff0d408d144d64639cb6185fe306e7d4ac. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GXF972460088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158e789695b2ef7c04ce3b39eb8c981e127b7c5ce74d001e80225ba5d32d073f. 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/GX5MY2577287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a58e2fe8d035abef770dc29559be051db811890ac8ddaa9eacfb50051c43d4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX5MY2565085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24af3e1f285290e1f42414630add793ff236b9e706dba6e597af783cebe4df52. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GX5MY2578373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9abdde2ec772fede0c1808a8206213aa24b4ee9300201faf5662f6e568a54b7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GX5MY2560159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fcc716943aa1e8b8e562eecbe5f0eb99fd2082076422327075138dbb7bbba1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/GXESV2541552.