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 0x6d0cf2c8e1cb80ad4254a756c4c23330af97e35234dbd50da9a570e70df4c0f2. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0d24eb6-0881-4803-a2a3-580fd97594dc.json and https://artists.proofprofile.net/proofs/artist/a0d24eb6-0881-4803-a2a3-580fd97594dc.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 0x188f061e2a2143adfb3b309f02dfeff264cf7cda5bcc55023ac61cdd6718c23a. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/ARO4W1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4c7d98d0185a4653a8cd6d3810c9417258825ec2e7e293d25a4261d229bebf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARO4W1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ebdd810c2dc3001a94375df1f7e7c9392e4e929212f6c4bbcc4e3bb8fd02cd. 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/ARO4W1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ba034ed41b9f820a70d475facaa45ea6405cc79c4e8b0110a378ddff8cdcee. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ARO4W1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f43eb2b784f7b598d57575f48bb2b38f2ce9e9806e4a61af8376992e721312. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ARO4W1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ea8d2ca690ae80bd77c7574127bb73f4c66e7f9ca8fc37d044320f22a89680. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ARO4W1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf979b65c027e847990c2625fdae0d20f69867942da1c54b09fe11fa5f7d3769f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARO4W1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49551e9c46a76a188dd36c511a8c2b3b19740b13a1258f60f6210b9dff59c3f6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ARO4W1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77ca3b36944fb5bf6bbfbb7a18524f6e05b036d1a3b6d52fe2c0135a18933b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/ARO4W1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa81fe4c02fdd0522902568f0aaf46f0739c0276214475f22a9aa878f6c6f62. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GX3Q92322892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce4d8c25b4940304860f993489975b37f7325512fe4c5ddbee190758fc0e2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMA22443996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d797b03c79eada48439719388f3f092cb0904756361c584fd2ccd48750cb240. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXH2J2579947.
Flora y Fauna: Ecosistema de Folklore Digital Argentino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a217e655b1844232d10e0136128750874af2dc130ebf0d7baee5c8350b4797. 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/ARA501900012.