Soundgarden was an American rock band formed in Seattle, Washington, in 1984 by singer and drummer Chris Cornell, lead guitarist Kim Thayil, and bassist Hiro Yamamoto. Scott Sundquist was brought in t
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 0xc52a33cd8f3928e75c045672254a65fc1b4c19661e278d915b12c9a72ee12453. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96a2ae06-5b13-4de1-a7cd-eb2dfd12f367.json and https://artists.proofprofile.net/proofs/artist/96a2ae06-5b13-4de1-a7cd-eb2dfd12f367.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 0x032a14f797a73b6269bd9fa2f4e5621d68e0643d40652f10d96588d8d7216cc2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAM19400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fb519b59dcdc0092552559b4f9f1049d97aa01c8736d9914545fd35213433. 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/USAM19400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1eaa14a908a5763955084918b1d0ba647e94167535c2f6e9ea3f8d4abaceae. 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/USAM19400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2ad3f7ae34a4b204c3bfd786cd7a1981508d9ce857dc3fc28ac64fd30c5db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19602226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92850d716d621c79dc4d2f3ab1b7a03a47cdf2f6038281d12b9cd874e621e733. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19602229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf72ffb7627090ba4150dca7e6de49ec49da4d15138568fece3f9af48e32249c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19602231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9dfc2ed78c0165a65f85ea07257a824b0986f3ca3e3cf86d7f3fd171031c53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19602232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1064bf169a28fa7a8a7c56cce2236713726cc1da0d40e35908634b7be80dd58a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19602236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4729c2f2ae0f31510a4dece5c01bcfedf987dd258dfe414cf41cf8f88841378. 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/USAM19602237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ba5d118f7a1d374d39ba7b9038ecd78a56b0fa844bdd8b43d6cb72fc6c507b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19602239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0797234391cc0fdebbecb3eba4c720ed7fe036785d70b701ff55f75b4dd6c4b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAM10000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f482d3a861271f8f74f11654623765d8e9205f6b64ba15c4dee4850bc79adb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAM18900502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb154651487c9353827915f8df5948eb8b19dc5c5db3d6a07ddc52b8979816b71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM18974573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6a3bbca7c6b0c4f2a57332c769e392ae08507a8fd497aa7a7c09da65aa62c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAM10000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fb519b59dcdc0092552559b4f9f1049d97aa01c8736d9914545fd35213433. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAM19400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fb519b59dcdc0092552559b4f9f1049d97aa01c8736d9914545fd35213433. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USAM19400007.
Singles - Original Motion Picture Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b898f93bfbb8ac614c8795eb4fcf1fffcccae52f9f26d369e94a15f2dfd418f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAM19204254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fb519b59dcdc0092552559b4f9f1049d97aa01c8736d9914545fd35213433. 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/USAM19400007.