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 0x56f2127f20f3e925595bde74c7f2380ccb1ba9dff7395af32f21f6fb17ebff53. 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/5d0aa9cd-c827-4d1a-8a0a-ab4fcf353f81.json and https://artists.proofprofile.net/proofs/artist/5d0aa9cd-c827-4d1a-8a0a-ab4fcf353f81.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 0xc7786e5fb38165261f44d73692503cb6c30ade13f09fadf5c3bb5d92dbd5a0f1. 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/TCADN1816234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6efcf949017ee566ec2b4c78c2bd37a75b44bd962cf79e38866d3c9e8ae86. 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/ESA011891749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a34cbdad69878cb72fa5e63b0e9738d63b06125915e52116e6222f1171c476. 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/ESA011891752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a92cae7b6e3af4ae14852931f34bc53c7a5136bc802ec39111423b6307a7a3. 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/ESA011891758.
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 0x1788afb58a5fc11eb3bf530740b1eefd9b3988d8d0396166818121024537bb40. 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/ESA011891757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14737df64d4144f9d1d50ebb6a7fc50e66d86a7cfffd4c8f253c33a411d5d236. 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/ESA011891748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a60e6cabbe7707bed558f3400a06aa685416a851fb7c1e877c9c96eddc8297. 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/ESA011891751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0041f8bf609f9489d2000579fadb6b47aba9af9e4aa99c579cc26dfeb70e73c3. 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/TCACY1754294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf99081e339655e7dd127aae1811eccba690b9afcd093be5ffd5f0fd5a6fae. 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/TCACY1754316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d2c86cc9a3b012d9534bdd34974ed5fb913009810b311cfe6851464ad247c8. 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/TCACY1754317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83209d0271b1314aa540a9a0360b58fc487748d3399bb7283f76168f2447cc30. 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/ESA011891754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea58efa8e73d7179285d38e8095cd4cc72fbc287966c85d9471c807d9e71acd. 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/TCACY1754231.
Fuimos al Cementerio a Invocar a los Lagartos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ade99ff6fc93abc7a8407e88b5098e93619a37151c88e42c0ea3373790d305c. 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/ESA011891750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb8121b2014385f7b09c65214ef5b19254811d308bc4c19aa0e4a44a50650a. 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/ESA011891755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8452ee4098241cd0f8aed8af649879edb0465722ad42338a53222945f9e57ea. 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/TCACY1754300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c51c2a288392fc29deaffef1c8cb419164172f8b3a190b056782632550eee3. 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/ESA011891747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d46061ab2384f860b9662157e892bd3f5847b69de37c7d38086fa70d236d0c. 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/ESA011891753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0ab32dc6cf74c6303bb55031c5a951ff678ee432319f9236dee88c00959529. 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/TCACY1754232.
Llamamos Otra Vez a los Lagartos a Ver Si Tal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88601696f558e78d16d800456bfe1ba41c922644a9f7ff590701824fafcf00c0. 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/ESA011891756.