thumb|right|upright=1.3|SN 1994D (bright spot on the lower left), a Type Ia supernova within its host galaxy, NGC 4526 A supernova (: supernovae) is a powerful and luminous explosion of a star. A supe
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 0xa7c9c2f8f76834bb9485ead140a5e0a134076a2875b59a0c89b749c96fc4282f. 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/a3e713a4-1de5-4cc5-9b4b-0ab148a811ec.json and https://artists.proofprofile.net/proofs/artist/a3e713a4-1de5-4cc5-9b4b-0ab148a811ec.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 0x291e3011f1aac644ce01863b050c0564bf421862ec51cd4ab66dd54fc9142c1e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IDA181244302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e5c45d6bb9b588529eef94de20427db3e1f511e22a4db73b1a47b3b96e705c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/IDA181244303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6535c81bb26f003beb18a456d5aa57ac349b539c7d8f0cbb8d1c0643f3b669. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:54Z), 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/IDA181244307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b88f22eb8bb1b01d299f9b75fdf0184332b7216c6cc90088d6ea1020bed073. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IDA181244309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b0ce8a4358c1fc9bd11f692381749e841c34d974be8a74c4036bbdd2e479f1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IDA181244311.
Quiero, Quiero y Quiero (La Estrella Musical de Chilpancingo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99165bc24f642a3edcd4b159956dc4b8deb308927d61dbaf04dba801bfb4ed32. 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/IDA181427343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991977f6a90f93e692c3ca57c83c2e0706574ea05ca5ef8caa309718d522cd5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA181427346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99165bc24f642a3edcd4b159956dc4b8deb308927d61dbaf04dba801bfb4ed32. 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/IDA181427343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991977f6a90f93e692c3ca57c83c2e0706574ea05ca5ef8caa309718d522cd5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:05:12Z), 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/IDA181427346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58295520d8d59b76089e327948435dfe7e4c152c2108ba7cc85aee7ddf93e45. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT5M52518564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa74f617e9760feb63ff6bd8e1c633661fa6ce34095742cd9d1b6809178d8acc. 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/GBMA21920567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa7283f1dc7b42aa6bd264aeba2f75b52975f767726eb2078ab1cfaeac9542. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBMA21920522.
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 0x8a638a9001ba7e166e971ef914d80be196420191fb2852c7046a0d357da0c5d3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CH0049802860.