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 0xc168f3bd8ad97a3bea278544f5ebdec8cac8d815469dcb453afaea1b700b5a62. 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/9ce6a66c-bbb0-42f5-a347-dd4dc5294fbe.json and https://artists.proofprofile.net/proofs/artist/9ce6a66c-bbb0-42f5-a347-dd4dc5294fbe.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 0xc33f898fe62f3733e206b4dc7f7a155298c2ea2d7026ce56056c83a174567a6d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AR50U2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c50a835f1223e45f0a8ba6f4ab9f63791ee4612b468b809401916c18f171a. 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/AR50U2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0258ea3a55aab387a040023768e6073fc87c37391edc37bb87128155924b04d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AR50U2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585de000e3e74dcd6e99b1b0d635f0366b733fec1d04f63b5ff2a08619d595f7. 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/AR50U2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb355cf6e203e71215a748912cca9d488506fa116f2ed0e288790851c26e98a76. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AR50U2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4779dd2084c40722abe9d5dee6f3663b361160b97f7b091f9d4af8cefc4476. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AR50U2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b1f1836d13280590cb189be38e36284aa34e9e1ddf701c2b2ced74e7107d1. 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/AR50U2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb25981126eb4b9a30ac146524ce410738f6d7365b1dc094e446124e268e25. 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/AR50U2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38960f590385c6462f8e1f31c5f5b9748ea9d765de07f467f7c62f03c24ae722. 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/AR50U2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440ae5e2016b60b1f40eabeed717ec47dd1993827474e10a59aa8d7b245c6169. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AR50U2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad418d51497f4ad7a18fbb284f6336255ac21e6b586fcdb9809071c99e9855b1. 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/AR50U2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b20b60ee44446a399352f6015f2a47235fcaeeed2072863f307641f7846933. 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/TCAFE2091809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954b42f9152431838e6e4649869350688cf474ac047facaee4203f98178fdbbe. 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/QMDA72370144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954b42f9152431838e6e4649869350688cf474ac047facaee4203f98178fdbbe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA72370144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3b8030065e54c703f331f8fff6f6ffd7251d474f66a7b5d0ba62894dadd273. 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/GX3Q92358306.
Semillas (feat. Perotá Chingó) - Acústica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8698849f5901d3baa92d5b38bce054fd35888071f63d16d3016cda9f793576. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5151901622.
Claridad (feat. Perotá Chingó) - Acústica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9140c15af836c4aee65d7cbc911adc8b212643ce028f77d102135cd337f0d736. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5151901627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4688328dc635d36565c4f8f7e22a39461e041d8ff460627b5fdc5722029ee5fe. 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/ARF102100243.
Insostenible Irreemplazable Rock and Roll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b61cf599ddf1534dfc7cf3128834c73e46db9a9eee96d82441610db71a2ad8. 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/BRUZ22400010.