thumb|right|Big Foot Mama in 2009 Big Foot Mama is a rock band from Ljubljana, Slovenia. It is one of the most popular Slovenian pop rock bands of the 1990s. The group started their career in 1990.
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 0xb17614111664b6afb6dc1246f8667a12a76f6ea2d5ada8711cec603895f7b5b9. 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/ce0d1b1c-0ec5-4c5c-a335-f698903071f5.json and https://artists.proofprofile.net/proofs/artist/ce0d1b1c-0ec5-4c5c-a335-f698903071f5.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 0x5805600827bc4742f6c35929df38e0f9d812687877aecb076a3d5023330fca7a. 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/SIC030313604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719ce6ca2c96977c14699d6380e693c8f6df9d2ba149ee91e16a9363abf14b7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SIC030313610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902545b8cbad669f7ad9b65be49d249888d3df805ab8768deca543d9003cb935. 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/SIA060900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d285cb491c55a54cd98a966e799fb9c6150821d79bd71f5d3585887932508. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SIA060900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c68c94a4f0fa81ad91fad836ca5fbb38afdf695480d814d000f89fa494cabbe. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SIC031300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54652584e2485ccbb467586c03d0ccfe521e431f1085b2a13c2b6beb5aadfa49. 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/SIC031300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d88b8a4c88fea67eac2643ac33532c20bc14d63177a00ad7cdc8b1f582500. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SIC031300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a3c866b607dbeeb8fc27929fbf84ce226e2b64b6a707db57e00892942304be. 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/SIC031300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d700b09d7b6e1fdb286183e7e6a5d9e334cf24aa5f5ccaea002953112c0d7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SIC031300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8a90dea24f0c2c8595bd92bddc7ac813626bfa779eae742c85a194135b1581. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SIC031300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bdc60feaa196f4a8a035abb3fb97ca636c9bb51bf4f9e2b6f74cf7f9441c7f. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/SIC031300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747ff8a614625b21e616b82df9a16d63cc135824bf528501007045fa5e424efd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SIC031300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3550b524b8d3924f0c6ba93ed37a6e1dd89b753b7e89dcb114ec081b759d29e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SIC030415902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a3f2e8ecd0516cba35ba86072427d5ad40fe722e5ecd5c30781ca5b8b95ed1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SIC030415905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837896c429a32843096b009240e854a184f505fd78bd3d91bc8a6f49d95cbce. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:15Z), 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/SIC030415912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8104e818383dc7aa26a68f97f54e3a71cdb4a0efebe7d7c2dee1ad938ee7fb04. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SIA420700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc23f4e2e36930fdca68055b27af95a4443b8c594ffd2f2ee21747e7d4b8b82a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SIA421200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c5cd7bae891f2cd41f6e2d7933d99c37b89b79c8e31bec061953ca26bc897. 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/SIA421200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2842c6c22056cf3c4051c1cc089b2ee86e500bb6370d0d891ca638813bee7b. 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/SIC031834302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf342117581b5d47d7c486b18c2072891f65c4922290a2e48637d8a458734d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SIC031834308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dfd9fe9b55177918e930a489a9d71b879269ba6c53c820d761d9e6b13f4799. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SIC031834309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383da78715bc9334892a348751b60d2c2ce14c4ec3f0ea3078396853d70392e4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SIC032500050.