Rinzen is a sculpture by Antoni Tàpies conserved at MACBA, the Contemporary Art Museum of Barcelona.Rinzen at museum's website Description Rinzen is a masterful piece by the Catalan artist Antoni Tàp
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 0xaabe675e6153a78254be219d6ff588e9f33ffb23f184f5420863b9c7c9b3e3a2. 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/32b733fe-3b25-4681-8738-4541fcea6076.json and https://artists.proofprofile.net/proofs/artist/32b733fe-3b25-4681-8738-4541fcea6076.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 0x84851de53d93d3a1ffd40598f92f0597d3dda96ffc504f4595648c08c3f8f4e6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US83Z1916242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e1636e4c341cf22b108f677d1a8378e8a3bf59a6ac2830d9a14a42122db52. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US83Z1916243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332a6604842e1d51e066c624b1642c88a36479ef560b7d6592639405d17d8d02. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US83Z1916244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cdd2b455b3eb3655b532a461b1e348fcceee2923377f29334204ef7967bc5d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEH742002423.
Orchid (Inspired by 'The Outlaw Ocean' a book by Ian Urbina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c0b1ce4acd3fa38d152a53721f54c895442c62aa78349da398d9df64ee28c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMGR32048253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea04433c50a2bb510c48a46de8c51fee60baddd441df3e1c7f97d6e57f2a9c5. 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/GBEWA2102720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c433896cb75922d653a3d7da1bbe7620b327c98cc0f7568c93a833d31e53266. 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/GBEWA2100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12087e400fcf7c4251312a58c355e3c0f54e74f35bb7230bd094d67dc565343b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRIDO2112762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4826bf37ee052cb6543835fc57f72d42d523572f9c5b2ba85d0f356053c2c. 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/FRIDO2112763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aa480e5e92c0b318f7c9ce8ebb230a87918d0e17e16e314cf67f5c2ebee24b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBEPM2201813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bcdb36a85bf181bb3bb3cd0941111f900ae91c6b8fcf61ec5d130ed8a34593. 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/CA5KR2294507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b2e65b52fd859e243670d5a465ad66f05009b4690ff3a8a0ccd1cb834268d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBEWA2305130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9508c6054ed9c79231559c0dc75b8e345d0252b91399f22bbd53d4396a9d75b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBEWA2305131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500adbbf9cef978d08af9eb921e00a5c845b84eac06d4cec441aa128db64bf98. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBEWA2307211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500adbbf9cef978d08af9eb921e00a5c845b84eac06d4cec441aa128db64bf98. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBEWA2307211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30dd9d091a4e4ad59bbe0b55d874d82d1f091d7363e22d3f8ea056c19e31a34. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBEWA2307214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360741cfe6773465386a2d883d5accf0198a8e7c54092ffb21d61bece15f8711. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBEWA2307215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0417a161fdaa14589bd9934fcdd7cfffe2c946a6ef4a988797dc7531fe1c21e8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBEWA2307217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b192b73082753b8d801894a742403ceec41b1b2e3ed8087bd0d358743878fe. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBEWA2307218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c589c95df0480907be58202eff6c26a2e52f95bf66dd7c42a4da222bfd1e38. 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/GBEWA2502900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13288154ae62b716309d70cce2c3f80f8b09902ce6294ba2272bdb302db8a0e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBEWA2502901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4bf567603cf45434b672e1ae98c6fa04ee9d8384c3386444263e0dd5f6fc78. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKACT2231816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d75b5a531af4c3ee29a812e75fe821ff2d94afc76b257d338f6491238f2be1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKACT2231817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7373912a593f25879de3b7da576873bf8a2871fecfd5888c16e45e0fc3088df8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKACT2231818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb67bb611773a370b94d820d505092c858ab04c3d14a421892d9dd684845a700. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/UKACT2231819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3624e9c8dea4ead6f78c2e7a2d4e932cc5f6d5b252fe0925a4404f2af89133. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBEWA2401127.