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 0xbc8d3ad4318078af318b8277ee69e72078dad565e5edfaacd41531107b41d26f. 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/d91a18c5-a6e6-4a82-8a97-b4a62623a37a.json and https://artists.proofprofile.net/proofs/artist/d91a18c5-a6e6-4a82-8a97-b4a62623a37a.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 0xa91e5babeac346401a7a14fe966d271e413a7ba8a20b334944501a843bbb8512. 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/DEAR41535484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89530a098361c342ba5102c5e3122da3a15ac72958838313d4982974b3d74547. 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/DEAR41626680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52234a27f3b230fc43632e1dba3a6fc82f9f483bd709b8eef310374c9ba45de4. 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/DEAR41626683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d0794b953674b1768443c8178c0465397b96ea4b3b014f279dfd8218217ea7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEAR41626684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a79aafc48fe27a84359b79ef8523e176eedde67cb733a14a60482fa31676877. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEAR41645662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49143701c42bfd365f69cf3339f3568dfc30f2de3baf0977fb4de03996089e. 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/DEAR41711653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f52ab208c499cdc60184037670b4a9a511f012b34c6e448c166ed23380e45b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEAR41726069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340022afbbab71aa7c03c3b575692b6d8964b3a08c27348bab609285306d98b3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEAR41786162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8461c1775a0d7ca2f72c826d1fb46d7882d1d31ec0831a45ca3b8065d4f5bae5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEAR41835797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d967fa3aaa35f61df1e6b1caf2f0ab1f533a3229cbb6e82e644f2f1e77418f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEAR41891792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234379383b482a6b2d861d5a62876334f5f10dde9ea8321a8a31f7f27e61df7a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEAR41893181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6eee1edc929b5cf323ae67278741cdc833e5b891094a47bfbfd3cb65d53e2b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEAR41843763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77fb619463f041c4982d27bde9043773132e317de22038de699326ead169b84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEAR41847791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c134b3641e5dc6b599607d5e2632a4e5825f1f33ecebb033ee88c4606a1e5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEAR41851017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f51fc3b501705cf0c95d48b19e03aa596d9cb14ec28fca8a863a54f8634043. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEAR41894360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d95aa22ab2efed5b22489d697c26e268240dab0564b0373a47f511eb2fae3. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/DEAR41814145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d84e5b57dbbef35c6f955e09ba601c3bd6ad12b265c601284aa73d63c75f80. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEAR41812868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd478904193a43f01ba275b6f7f663f77d7c2b747929296a5938a907ad3591. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEAR41861159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f62420d308276d89fe897d0e62400433ecddb25427ab66dd935cb2a1c7055. 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/DEAR41812453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba1dd87c4d8134643f6df48652ab7b62b24de25e1b1523ef6c430ff87871bc3. 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/DEAR41878898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa0d232eb9c3816d225fd24699e8a1149a72029f4ed79ef7b1afcb571c640d6. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CH7811926385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783720f1af284fb7d64f310ddd601bbbc984b4e0a0ff087db68acb84d5359d38. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CH7811933784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee87cf83a8b9af5cb80e312beb9bc591041a229563d7d319b1ae4dfc91a7a239. 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/CH7811933785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663ec46def54fa73239961fe3cf255d9457b323fed688a00160d6402c4b99169. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CH7811933786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42f79390d3f5f7cf189029f86ae7562d0bcdccb368e2df2dcb0d6e4415ee25. 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/CH7811933787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53394829f793b693c0e71c8ae93dded402c8f3ee606032e3fe97868f8dc49420. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH7811933788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde946f751581211d21adb886f3e511731a9c55a592a5c715ac0234625915005. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CH7811933789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c48351e3e1ef71f5fe62455854eaa1b785a4c18dc48e8384da352341b55b356. 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/CH7812110171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca30f5158218ca4cba66ad7e7482cf9bdec203ad2584789e345c1b7a1eb0d0b. 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/CH7812110119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ba9803717590d9f33437e8321feab8479265ad2507deb8647a29a9c5c1cf17. 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/CH7812218531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53336752e674b135d59df58dcbe2cb7f9158374a86e59f311d1b45e9454b4e80. 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/CH7812229080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3066e23576b31c331d7ab616581a4f859864d7bc7e6ca990d6f5fe3321abda3. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/CH7812357821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1439d4330d957c318bc6d7062b38996dce8f5c5368771c442e4deaabf457981a. 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/CH7812358196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7962b22ac0f6516ba6e31a5c5a43c89081a8fa832e2aa9334204bfd2cc411. 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/CH7812363466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04e5a3a80e54becb8d2067d67a6868b40964d9a0be3980eabb08a60625ab5db. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CH7812412146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c35dac8a0967466259224d82711ef96b061cb8c80bda8ee63376352e61dc2c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812411988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96494019bf04a18ba5c07992013c7494b6b2a782f062e631e3d4f54b24221c1. 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/CH7812419209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f1996d8e9ceee69b903adf5ebd49337579894afe1ebaf818574aace5f9ce6. 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/DELJ82009509.