thumb|upright=1.5|Marina on Portugal Avenue, Rio de Janeiro, Brazil thumb|upright=1.5|Marina in Fort Lauderdale, Florida A marina (from Spanish , Portuguese and Italian : "related to the sea") is a d
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 0x117fa7ed5ab9118997683530c33d1c081f3a837ec58de90b43b666d557db5d25. 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/6c220847-bca5-4a0e-8568-3f5f6c9437b8.json and https://artists.proofprofile.net/proofs/artist/6c220847-bca5-4a0e-8568-3f5f6c9437b8.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 0x7c3ae4937c65e3847e62edd89312843ade6505c2e779b8d78d3ef9e0a8f0de64. 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/PLB382300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee02b1b26a599e4f75542d3a5f765a66c4a954bcb3620113f7228f2660c323. 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/PLB382300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c18b3f389b6ddbe3532bae2c5e087779dd1aab73e393230db113b8a71fed5d. 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/PLB382300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f37cadf897292ad058cfc4bc49726b2ae79ea59842af18d0391b9047a51240. 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/PLB382300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d4ce0ebcd7f62d147342ad2bd848d9bdc1c444d6502e696ef7148239a5885a. 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/PLB382300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef1a0bcbfff1120b49eae2e83d788595efa700684552f11e767fb5b40bd640. 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/PLB382300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fcccc6d66ee2d668827906022f93407acb5bb71345f88c1fafdd6862ad489d. 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/PLB382300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3da1165848a3e060971a5380fb58561c5b3b024f6c7840e9f5af8227c8ca49. 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/PLB382200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d5a5090f6883e4f1e3a7f448bbcb62d1403aa3b51bb326732f29b43c7812a1. 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/PLB382200354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0a4fbfe95b629ccf4b9f0ba0496a3652d89708da194fdf738928107f3d92f5. 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/PLB382300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d78d88e6f3fcb613c2389be5eec03361222a5dbb34c625e0087c66a0cfb5bf. 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/PLB382300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273da2537d27acd94af7fe240e822772954e5e1914fb13ce60ca50b87d374fc. 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/PLB382300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa114dd7787c730c48cfa3ab3bf8ad30b9da660d92f4bee43d8fde182978382. 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/PLX482000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d3dc055cefcbcd102dbb8dc399b6ffe480a6f607033d79193c68685716f8a8. 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/PLX482000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6424b1d298572797cf6c22345b8397e276c2fd06b5e15600d869ff433551d63d. 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/PLX482000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e930277ed6bd8be66aa2d8f6409fbd5d4f593453ca17dedff5e11be05b5ecf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLX482000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92201d11e3eb808c0d441bcc2cca0f50401378e1f749cb753b0bda1b2dded183. 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/PLX482000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200e52edfcaae4a45ffe0ef748dcc9131661b2d6a13b86cd6afe0081aaafca9a. 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/PLX482000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d29b8c1f3e81777e1cdc908589fba8ea041e263f6dfeaad38e2b6db0e9cdbf. 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/PLX481900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebf2b5282efce2cac0cbac4c92d2d01bb4b296247ef3d2d1fe484ded0418c1b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PLX482000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d42a81e9dbe4907b9460a4273d1ebcf153fbddd13cb68f06ef78744671b12. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLX482000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7938f31c9e9c3ebd2220916bb14a713b44cb344edd416d8f511e650a5f43451. 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/PLX482000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00e9fd0f7995f40e75cf1b5685f2acf158571881698fb42b72240b3abccd61. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLX481700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f89f4dfbae5b416ed2582c3e8cf0f8162d7cd0bd67d890a549267d3a793b6. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/PLX481700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a5e9625ab19317e2b14230e993eae8fdd8c5c7d6f5ec0ca7d843905a111a8d. 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/PLX481700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124eedb23aee23abdb7ae6d1a4616375e653edf36ceb3f5098480c1d84720bcb. 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/PLX481700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c4d8ec450bab3752dca4590e2cabd8956e1af9bce55fbda8d98faa6f6bbbf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLX481700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774f992c8456e62bf5f889d9ca02838fda4a2b6f73e399e4f438ef04012ad1d4. 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/PLX481700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1418b124ca32d53658c27edfee2a1a985641ce8bbb791b8b541cb190777e92. 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/PLI360590690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0235582eccf07837b53de349e26c10718c05acfaaaeffdeaa8e21667980c1fc2. 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/PLI360590720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fa97c463db4729d8d19c19d5810943496085cdc70d99511e96982aa583dd29. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PLI361871680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3ddc3dd4b5cad807d7b58831b52c28b132b05f61c9f990b25ca4bcb788772. 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/PL1682300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbb7451b3547c294aaa33663d5020c77306bc47fa8a05e4cea8e7fe8fda4015. 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/PLX482300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaadca328f3690a58b5cbe144209ffc44d3e7d9c60a01d266c853311df6e161. 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/PLX482200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c7abf81ef6fcf6bbcf3bc8ce5ed202fc789de1a9dfef36caae8dbba1d2638. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLX482100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6424b1d298572797cf6c22345b8397e276c2fd06b5e15600d869ff433551d63d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLX482000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa114dd7787c730c48cfa3ab3bf8ad30b9da660d92f4bee43d8fde182978382. 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/PLX482000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d29b8c1f3e81777e1cdc908589fba8ea041e263f6dfeaad38e2b6db0e9cdbf. 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/PLX481900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2355124a2c5fa541b90f7e5da105d92b221d84804e70c7e106d496956d60a8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLI362465420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1df8366314a0e80394ca52db9714f19f70186f73f8a3ca233806d86c92d01f9. 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/PLI368065390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1766e44ccec20e7412f73591b6a6719da78ddfc152eec59c160a8894cd38a369. 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/PLI362820030.