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 0x21ee2a1d3261d30feeb96d286bf3334bfeaacaad7366f63d0b468972903b51c6. 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/da5dc967-0cfa-45a2-a25b-e0ef96166649.json and https://artists.proofprofile.net/proofs/artist/da5dc967-0cfa-45a2-a25b-e0ef96166649.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 0xb07320a49de85aa6de3c797d5f94f9e9d6bd2987329cf12da50a8a4de3940719. 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/USUYG1135191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4858a5825af618696a42aaca921c77bd87c804ea28339c5ed0e29152e45b54. 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/USUYG1135192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c24728cff72c04f896b8fe47bf1fb0857c138061bab3cac83fcef4c765b13. 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/USUYG1135193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0a236bd9fa4bdbe91363686638f6dd802f7acef60d3ff418192c95070da00. 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/USUYG1135194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e1f5cc94d1ebc8451cc2ce57174dd4912ab406632f0087e1925cf4418755a9. 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/USUYG1135195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf546e50185f257692a2de04fec371d0fce944c3e833a7ada61e80538b42b1513. 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/USUYG1135196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe533f9a17808de58d79743ef909d3a6c3e9f07165667e4e7d3a522f693083. 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/USUYG1135197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce5d2a3ce16c5baca514b65b8d020ffcff34fcb5dae6bb3228e8942cc6f8fe1. 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/USUYG1135198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18f69425d23fa40cfda07e42fa06c936a5664a19de9fd02f3a6b93d5a821699. 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/USUYG1135199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda95c8edad4c3850ce2e697b885df8be9212c109c0b88b3c5820a8c4f6a222. 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/USUYG1135200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf050218038196e63863b056e4e4fa7b4aad9d29a580a4a28c124a659b6a3791. 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/USUYG1135201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d20ad52e5bc189ed33d8574e456d2d638c69d25776b607b0db7678e1b1b0d. 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/USUYG1135202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bff993f74db054f453f34efd2bf0138c2675bdf902b45fcdd515e4bcedb7a4. 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/USUYG1135203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84643ff33f9febe7978790a8395c024f881dfd0c623b995fd88434f943b94bc2. 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/USUYG1135204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cd1bde34e6b4584286c5a9706607363d0e466132ecd227b4d207bb0de19bf6. 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/USUYG1135205.
The B'Sides #1 No Quiero Más Dolor / No Más Pain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075a0996d3b85c772b0590b9cae33df9c8d72a6f23433041fadfe826a76e0eb7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA011611657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11716cea49282d4bb00392f51322b4bb90bf9c0b716f231d4ba44b017ddcc4d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACK1579735.