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 0x521a4690f0f6e104f029137198a4fb971786a83c676e9ba037e21afc9ecd8937. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c4939c3-b282-4e5e-ba9f-8a1f6cffe77c.json and https://artists.proofprofile.net/proofs/artist/4c4939c3-b282-4e5e-ba9f-8a1f6cffe77c.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 0x929df9f2b90d9c442bdfd3ece66568ab45311b906957540f0b036c46eadccca6. 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/ITAD82000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd342461f3f896ab79d7ea4334bdefa7ff077261632fd991d60e96eac2dd51f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITAD82100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13ff278f654adf4be22c6e4557a77b9402686047ee5e146f1a79442f692825. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITAD82100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae3face1f0230907904a2b32f6ffad1b807bb235834b83d9c71b4e06e036f2. 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/ITAD82500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd500cb00fb3952a575d8c269b8004e61c7dd04adaf84013f3e28b5c4c0497. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITAD81900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3a2a9bd4dbb9a1aa95188f07cb56b83db862585dd90eaccdab8bed8880533. 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/ITAD81800015.
House Relax, Vol. 7 (World No China) [Deep and Chill Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929df9f2b90d9c442bdfd3ece66568ab45311b906957540f0b036c46eadccca6. 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/ITAD82000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3a2a9bd4dbb9a1aa95188f07cb56b83db862585dd90eaccdab8bed8880533. 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/ITAD81800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13ff278f654adf4be22c6e4557a77b9402686047ee5e146f1a79442f692825. 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/ITAD82100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c8c72ba99eb8fad65716669ba2f7e9aeff40a2ca07754950b25f8875e8084. 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/ITAD82100024.
Deep on the Beach, Vol. 2 (Best of Chill & Deep House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929df9f2b90d9c442bdfd3ece66568ab45311b906957540f0b036c46eadccca6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITAD82000048.
House Relax, Vol. 10 (Sunset Deep Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13ff278f654adf4be22c6e4557a77b9402686047ee5e146f1a79442f692825. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITAD82100095.
Deep House Lounge, Vol. 5 (Chill out Set)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc85a059a489425eb4497df7985f15105b7e6c35f8ecf6bbf6f3c850ae95dad2. 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/ITAD82000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd342461f3f896ab79d7ea4334bdefa7ff077261632fd991d60e96eac2dd51f. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/ITAD82100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13ff278f654adf4be22c6e4557a77b9402686047ee5e146f1a79442f692825. 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/ITAD82100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd342461f3f896ab79d7ea4334bdefa7ff077261632fd991d60e96eac2dd51f. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ITAD82100023.
House Relax, Vol. 5 (Deep and Chill Set)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd500cb00fb3952a575d8c269b8004e61c7dd04adaf84013f3e28b5c4c0497. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITAD81900077.