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 0x77ed812c9ede576b482e943c12bae2557ff3c07a66374768b8da43aa9e133c07. 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/ff786733-5f06-482c-a584-3649cd963187.json and https://artists.proofprofile.net/proofs/artist/ff786733-5f06-482c-a584-3649cd963187.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 0x5347c4b05e222f0f729905401fb866b4043732c11cd93ea30c5a410823b7afbe. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:44Z), 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/PLC062361699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff87dc3f31f0cb3afeb2e6c627beaed105b4618a440bfa99f4f9726d34ae76be. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/PLC062383327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b6167a89cf9fd1a97bd1455de0e7c8bb418609e6f3c78bc3b741bd0eca785. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLC062387391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe157110054545f7cf4eb68ecea4ef028486b30d04c34274abb80e39c997a63. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLC062389985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed7adf1f0a7854e820bfa373219d1f806f18f064c4abe0e41db1124b24ceee2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:54:41Z), 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/PLC062392058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb63a86ddf3d1a91daa2a458ff9fc1cdf755906ecb23e0d36343b01ef877ff23. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:10Z), 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/PLC062394561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6849054289445e5466e826f110920eca679801f133ba1c8c68afdc3e8e81170e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:01:42Z), 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/PLC062394834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a084bd86629628778b27f800e183cb5a248069ed325d92ea46737e19b3253b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLC062403308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f36992242b228b60e76626aa081d729715d8e534ea8983a759cd2053b6a6cb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLC062410708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f28535f4dce5a3f7ea0890eb77c7f1075aee6686192d54c17490db0c853a97f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:58Z), 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/PLC062420385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7d868e9b5f78ace02d1a8abdcba150d8d8ab2f301db05e01ed9e562b68066. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062424944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6403d792b7b82d38d188d638f36111ec78160ec676ab2767e2ec8b2cd24ba70d. 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/PLC062427160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c316c30088b487f586d9f9e7eaf24f0c821cc53cd8523a7df4e807b5cff363. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/PLC062430359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b8bd6b3e248d81fd8481b5c046c29339b44c7c43a1ff5ee701e3d7308459f9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLC062438177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d45f6940317cc5fc5f6394eea0514c5006923f23ecb069e373e7dda7f07996. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLC062440672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f7a8a0d5ffd7ef478dc28aa6f21d1573d2732d9ccfef6a7b0823385d0929e. 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/PLC062509417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc6a9611e8c40f0aa1096abad5b3e1c6295f7f0534d4b3817d1a793fdc73a5d. 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/PLC062524468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4044f8b51df8f7279e61bf9e647e00b4f4e9b8febd03269e1ea8a068e1e90b5e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:05:57Z), 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/PLC062544404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1281b6673e89a6bb4003174ea2a331314e5aa040f51d72e7046b911a6b58b2b9. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:31Z), 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/PLC062546925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaedab8c68c0fa5b4011fb15e23fc44445911761a860d5f2f7752e0aeb545bb3. 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/PL4K02501364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f7e7faa24502e90c02466b4f56cb76854b7ebbc54041175d6d9d1d61a0ccbe. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PL4K02512943.