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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db0d47c9871d843c2c37e532911ea0746255f3e40ddf09c4af9927eabcf0b78. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/746ad041-6fd7-47c0-8bce-5e5e61f66e21.json and https://artists.proofprofile.net/proofs/artist/746ad041-6fd7-47c0-8bce-5e5e61f66e21.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ac220f7a5053c921be87c2a8fd2fc976d79e1ca605b4e0d2a58763fe805171. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKVBF1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b1af8775c54c004f70b20c3e2a3492779359718592beea55bfe3bde86b14a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKVBF1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ff07355cb906fa4980c45c8f68f7513c76063c661bda8b2962710cbd1295be. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKVBF1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589c546bf15295ede1d2806de8a1b653b1a8128e99bc103472330c082afb031. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKVBF1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5feb2babfece57db452e1793e106b71e677e2a325f3a9d61b4037539afc9e48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKVBF1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca81a849b713913cb47f552660ad408bd17a5a27ea2522dfd879a32da1745e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKVBF1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b1af8775c54c004f70b20c3e2a3492779359718592beea55bfe3bde86b14a8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKVBF1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74bb099c170bcc03547e8c774aae56e14fa72c2f15107070e9cb04248088b0d. 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/PL29Q2224516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd786f20e9fbc3ff7e8341e670252f41a5c493816730124f21f905f1cc2058130. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL29Q2224526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e98074266c954ed5c390fb01170a1df1caa7f8b0fb66bd81f8f9893bb6008. 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/PL29Q2224485.
Sounds of Smooth Nature with Bird and Water Flow Noise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548e4000bbf727d49e215a03c23d6e0bfd781fb6e0aa908b88c079dca2d8555. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL29Q2224602.