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 0x3efcd02ffaae55f9527b5a246859fe78ff5b5fbe8b73ccc6d6b204135e36196c. 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/cd66cfee-5fd9-4654-95ed-e456ba0e17d7.json and https://artists.proofprofile.net/proofs/artist/cd66cfee-5fd9-4654-95ed-e456ba0e17d7.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 0x419ca4fe5644934568cbf97fa79db2e2fa7a18833c2ccc37662c2b552d0b8eb8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES5590603022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a9936a31eb89d2e27fcc65717457e19a227f79410a3c65943f4cfb7e39192. 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/ES5089104785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd7b0d5db28a3869f35b8c65c45751ea8642812a98256d8dad53cc9144e99f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ES5089104776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7893ea39b74d4be08b4a23c1ef853fe3d30fd4a0c322186c4df3b810e23fae63. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5029600190.
Los Grandes Grupos Españoles de los 80's : Tahures Zurdos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f45b9cbcd88ac682b4d1edcdeb2f6794eed99c5abcc50a33c59495cd36a54ec. 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/ES5110002672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8efe93714a1ffa1fd3671f7226a0a30be6ca4e3b4761a049a64268cc07b3b2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA560779692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35492010a3dc6321afd00f1cc054b8b021d6f4b09e45087c6c9035aae6145f30. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA560779696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca256bc24d26c3d580e020c1001723118b67f3bead22262f4e7bce13fc4d556. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA560779698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a289357270429ed5a9968764dd41729365188e7539fd11db2f709b5da8950af. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USA560779705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b4f10b7c917790193a538be09cfdcda93d5918464ad319a9bffab4d5d164d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5379700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe6e1ea7c064b33238f08c7dfe1b7be056fd6fbc7950317f474a67c021d284. 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/ES5089404543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde575407cdb001254258021ccdf12153abe766b134bcbea9127b9af1ae87c2f6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ES5089404542.
Las 100 mejores canciones del Pop Español, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a9936a31eb89d2e27fcc65717457e19a227f79410a3c65943f4cfb7e39192. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES5089104785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013e8f57a91e2b93e7d7461482f3e1330a73d67b0914ee595d2a3fa9406dc902. 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/ES5029600193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f33baed6d51fa38fdc58a3b6b74c9d85418b9e340c69cfc3aced3f5b0f19c17. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES5029600191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d18cccef92c72ef5a98d70f67b4290dea3e20e2cb2b7ed67155c4c7594b1f34. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES5379700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d44a3fcf127ecb9b734c33f41690dc0332edc5aec8404f4caa32568ca09be. 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/QM6P42068795.
El mejor Pop español de los 90. Memory Park
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef9401a1b49129eea497ddd74b83c1a8059f7b6aa559cc04f92f3cdf58dfcd. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ES5089104784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a9936a31eb89d2e27fcc65717457e19a227f79410a3c65943f4cfb7e39192. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES5089104785.