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 0x292ddad0338b53f098b749f60515905fa38e2181c208942884f7032d50d4902e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e77d1d3b-b7dc-419d-aba7-c18245c0d386.json and https://artists.proofprofile.net/proofs/artist/e77d1d3b-b7dc-419d-aba7-c18245c0d386.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 0xdf3133316b06bb4f2e2089e5e89c625602f8c8ab6739668d10b3f97add089c4c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR59R2102605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac7385ba64408aeb87da50d53131fb601a8897a936670ceee81de08cf1fa50. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2102607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800702dae3cc4cad6d61251123890489a49cb7d110dfe73fbd8d842fbc2c462d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R2102610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa161f29b5d00f513a99e47749e2863343baf2734019779af4ff3a850abb69136. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R2102612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8475fe366a26ae20e5f3f9da74613172e83a32d3eab00b28b2546cec1bf29a93. 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/FR59R2102614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa1b63c770cc07da693ddc842288a4ed6b427e7f28153a2dc638021cb48d436. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR59R2102604.
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 0x1504e311f86954770518f705b02f5b610e57e18462d5e3eeecc415a5dfa8f6e5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR59R2102608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298fd91e01db7541635de267f7d317528323202a36b68b9732ab4ddb9cb4c590. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072192370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1a0cc81ce4479241255ea6851a171686d4838a98a48fc63522f0cd5bfae04. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072192372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0b30e4fd6a2e0ac376c9b8ce54868379fa03f5020682facc4939110ae77f6c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DGA072192374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e52bca4bdde938253e3d27ab02bdf6df78d1cc17a9040d3657de6a81fbbd54. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA072192378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdc3fd479125093531d884366db872392008d6d12b78c74fd7b7d68bfcdbe3c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA072192775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7aef123c17bea7f46a6aa408b6713c354cfcbc6a47a6e19fb843000914184e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA072192776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad4024adf3ec1f103a897f0589c299bea5a8ff59daa4c635dedcb485c770a4c. 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/DGA072192777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc6947f49a0a50cd4567f725bead40db8809dea746718ed6437e9709eb4849. 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/DGA072192780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e85ed1e13ab62c13e23879fe24deba9e946df33b24d5457fb93040d8e7665c0. 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/DGA072192782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472149236ef0e2b09a6d5891cd606869da2b91536fa592b4791ce69ef1985528. 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/DGA072192783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08379d82f3e28e759219cc770c8400cb8b2b3867cc1ddad926803c7cea5d585. 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/DGA072192785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097aab0796ff47fb88459d2efb3ba0119ccfe6ba131143c20ba5f2b6306796c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA072192778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbab0fbe45211e9aaed4325621a71b539826278c05a9679753d086394ebd63d9. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DGA072192779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1f32a5ed4c8b069ab5f8322f58fd2dc4e56f0f565f3cebe65856fa67a6549e. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DGA072192781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc430a8216c23e3c3bea5ba4db196dcbe6b82176e0fe4ebc4f14c22920d541b1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DGA072192784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec989192a882fd4d4e843d4568b1353f8077c622c55996cec6eb03fc19d4774. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA072184186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df2a8753ae6cc695f96b7625601cf00ec033ee7765654767f1b26f4f9962d5e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072184190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb67a4bbf6736583e7640a50b9094d3346cdf145435d65a8903e96f50fb3b20. 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/DGA072184191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2a6767f32c506869bbda0f7029c998bfef15580e92aa0f6cdfea4be78a825. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA072184184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68c3950cafd672f451676ea8966794d1f1031cb6093bb2e358683aa7f6dc3fa. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DGA072184189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd01c5709fdb16c288310824c0a9ed519ad1671a611ae0f6791c574415ff4376. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA072184137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fed3034c0228bce0a952e582bc3984d19ea9281baceb4b44ad2f67218a468c. 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/DGA072184139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0ab98ad5e8adafcb168432218d617e8e34f4ca4d38d52733d97a9cc360addc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072184142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b5c1fd98bc69041c1473efb6a4e9daff6f19f4d59235fa9f357e1890f63fd9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DGA072184138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe119b3738f76d3c70c1f47250bbf314d5df94188fe60e37e664928172eb933. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA072184141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe390c35bfbcf727673d3b64ee02bbe642608bc0185183688b702ed6aaf2abd20. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DGA072184143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f879b133afe5f37059fe99b28c4ccda72e556d51f379c1d63a635f174616932. 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/FRX202157417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f85193c48c021ddbc9f63570d07fac51f09e9a9eaaad03e52cceee50b053d9. 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/FRX202157419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ddef92c6493a97eb5159977dd13eee2e0769d7d1cf03a7af44ab47cf2e312. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRX202157420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd75a3fbb27ffe11e35e9f925dddfa9bff106baa2ac3562d51cf748a3a941df. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRX202157421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1c585c3bad133c6385d619a7ec4c49b33a3dce2b2221ee351260d16ee26832. 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/USHM81475638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb34a97bd5106c469fc6f3fc83a358e53be289f49cd260e18e7c2eea5be3a0f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM81475639.