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 0x8af91df9774a065e9225717eaca9ecc51e65407190819235434d5f27f1c1671e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47b4f40a-26fd-4477-ae5a-063eecacf39b.json and https://artists.proofprofile.net/proofs/artist/47b4f40a-26fd-4477-ae5a-063eecacf39b.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 0x1859d89bb7384fa0c7e5ea9d7f9a61b2687204466ed961a874c38fd468605137. 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/DK5C50120927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f894101f449227bd7421f6376c4e655ef69fe2cc3b4c4a779eca1b783f6b7. 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/DK5C50120928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335fc9c42256471701a1d3c3d431ef2a174ee90c2dcacf37f951f792f86c1a2b. 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/DK5C50120929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ff06fa69b10c9b99a2a24294bc83c974b1bffc1eb39ba9c07141b6b3c27cdb. 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/DK5C50120931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cf61c1bc2e63eafb28a8afbd7f59c87a6ae81c78cb79264a4b89677129bf9a. 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/DK5C50120932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92012a275981b2cb0ef1c7ffadef0124cd28d3d15e888ac989ca9bda99583dc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DK5C50120933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d23b581b76e75f31aa4fb75cdd3bad18dee429c6e169215e01b42a3e5f70a9. 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/DK5C50120934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9054124812f4d56f2a387fbfac5591a373a78042006afae985ea2c02543a75fc. 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/DK5C50120937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc769850207d2dcb99a089e6cc0974f9a5f752c64a97461a176eea10a934d5b9f. 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/DK5C50120939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1634cb4cc22015372aef88af9d66257819cf137e42f5c12c60e46e4abc82e4ac. 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/DK5C50120940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5edd6cef4eae8c5c8626e9d8d790a0d479573d46b10ff9d5cc27faca023e169. 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/DK5C50120963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f894101f449227bd7421f6376c4e655ef69fe2cc3b4c4a779eca1b783f6b7. 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/DK5C50120928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1859d89bb7384fa0c7e5ea9d7f9a61b2687204466ed961a874c38fd468605137. 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/DK5C50120927.