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 0x5b4a5ad6ce78d3402675abd97cfffff774436682bfa0f7254d94e85e8f9732cb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffa1ad69-4dba-4592-ae20-7e662fa87f51.json and https://artists.proofprofile.net/proofs/artist/ffa1ad69-4dba-4592-ae20-7e662fa87f51.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 0x378dfd857bf07b9ded9b8abf60da9628c92d2e7a60c3ce4de17d65c49a347ba8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6H2499410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8d1602a661843f7c3eacc03cd7d560123e0beb75d428ad16210051be9cda2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6H2499407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0b2aa0a3d4f16e61037057db0c2ca929fb134abf2f1ca870a5718f74ff8df0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6H2499408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee4414b732a7b97805c174395f805beb8f2e704e74c9b2e41b9fdfff7d813d1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:00Z), 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/QZK6J2382398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3119c5eaa79c09e5a980ec50b907ec9a336b74b0220e43d80815e7f0e79e4d8c. 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/QZK6Q2249949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c881af6d6c4d267fc49a66dd67093dc67650d8444a85ea312f3d98326c26e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:54:57Z), 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/QZK6J2382395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88924fa63f03174557f83be349dd7f566b0975fcbef1bcdc7bedb57d26a79cc7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6J2382394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41975ff9b3f29b2fd3e6274b9055e96e5e06f5ee366d54b2e003cdd36f40851d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6J2382402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1bbc1bfb299725d56564ea08b850bd7b50a4325c5d70292cb0eb3072860f5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:17Z), 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/QZK6H2499411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1feb717345cfc307adecde22bc8dae4b88a00c6bf892be951f6d5bc26209ab4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2267458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb3c07f658df44b47f00085e7ebbd1c62a0e8154e24cf8a40311425586f7d5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:42Z), 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/QZTB42232261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619080ec0bb883297b47ab343de29d537200325af291818ec8ff6d82284fc841. 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/QZTB42232260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23551bdf012ae7018483bc7b4336d0eed4df674282fe07da2f17727a0835038c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:57:25Z), 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/QZK6Q2249951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc6de4314dd4a693a6ac75efd1bb3a5ec53738589af10360d0fe3c8f966e48. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZK6J2382401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778b41b0e98142699ccfb524d9f32a399ea445a6a59cdd4be0d7d46ecf8493f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6J2382400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960b38abcfcb415728e210b8fd7f3ad221d05515009aafbc82468d4e8508f236. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:27Z), 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/QZK6J2382399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41859ab8f991293d250bc3fee02f4dd9b7b287e05f67a2e13e39333417d6ecf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:51Z), 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/QZK6J2382397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd54fae4ffe37426f398f8ece278375ef47240a212e2de8fef7f682dbf94d77. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTB42232257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c1325162363b438d93256f2d1269d4cfaa573182273efa7220fe629fc1d784. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6J2382396.