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 0xdf75bcf7bae992077d284345b02a2a62a5aa6f44515bc530ead81ab766992cb2. 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/7f852491-79b4-438f-a528-22fa679273f7.json and https://artists.proofprofile.net/proofs/artist/7f852491-79b4-438f-a528-22fa679273f7.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 0x31e5e36b3e2e3ad7701cb5599a5e0f8c88bd4ec9ee9841d5a13e78019b2e0e47. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZGXC2401493.
Holy Forever - Español (feat. Miel San Marcos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7399aab888f0a230d3fdd27f541854d4438588b77ddb06d7b95a927cf7083ad5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US6WP1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d51352a850ca319b79c3b018062280c594220b3f83b441a87f5469224a7d46. 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/US6WP2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c491a1eddc87e3e5892792ba7fe46f2b55bc726cf3c5a1235121b29cf32e349. 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/US6WP2300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa921c9c9efc8a8290bbac65e248b6a8b6d2461c80262bf96437fa7bb4d140624. 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/US6WP1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942fa55372a00e2d8ed22f794f774a7f23f80c311ae21f7ec072d52f91edd5ea. 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/US6WP1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444a55378c2b9dc4e4860aa5178e04554ea5b54b25a680df35e1b7f95ec64376. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCG61800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d51352a850ca319b79c3b018062280c594220b3f83b441a87f5469224a7d46. 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/US6WP2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c16ebd79abe47a764089e1bfd32b2d76c835ae2ed2cf889a0dcbd90d46f552. 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/USANG2274111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408987b650ce3aaaf7e1107e42055094d0b5db12ac9158e72c71d07632c4fbb4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM3DF2126041.
Paz Medley Salmo 121 | Paz, Cuán Dulce Paz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c28850b737ed19d527bfd3ef5b9bfd6c5b14b6d0bd9d248ec7e06363216cfcf. 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/US78V1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddeaf8923e3ab8c7d6ef1f24715718d76ca8c789b6b36eb51150ba0a986ffa2. 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/QM3DF2204874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf7759b0bef7c911e41ffcab4fd8b57bca14e512ec3075227cd4f46706c3dcf. 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/QM3DF2204876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6417959f2cf0c74d72465c31f12bcfa8d6eca41eb2e48f68abcf3a2c39e91d92. 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/QM3DF2204877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e0540c628539aa5bedb167a88faab763ca067b60605b40f04bc0932307cbf. 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/QM3DF2204878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eaea2576e6a0c1b238ed94848b05ca4de5edca2cfeb0a00201b79e4f9e72eb. 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/QM3DF2204879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea4c6fe4c58afcc4203648e5e7e2f88c6f843ffcaa962172961f40e12738381. 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/QM3DF2204880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae7641df7b5ae183743c91f3435b7cebd73ca2c56a895835d2f39a13dc01be. 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/QM3DF2204883.